MINISTRY OF SCIENCE AND TECHNOLOGY
Strossmayerov trg 4, HR - 10000 ZAGREBtel.: +385 1 459 44 44, fax: +385 1 459 44 69
E-mail: ured@znanost.hr
Title: Speech Acoustics
Title: Instructions for auditory and laboratorious exercises for
electroacoustics
Title: Loudspeakers
Title: Perceptibility of early reflection
Title: Room as reason of sound source dislocation
Title: Dependence of speech intelligibility upon the bandwith of
transfer channel
Title: Dependence of PZM Characteristics upon Boundary Surface
Title: Valuation of Minimal Coefficient IAKK in Real Room
Title: Absorption Materials for Noise and Vibrations
Title: Apply of Special Kinds of Microphones
Title: Acoustic and Electroacoustic Measurements
Title: Comparative Measurements on Hydroacoustic Transducers
Title: Comparison of Different Methods for Reverberation Time
Measuring
Title: The Characteristics of Ultrasound PZM
Title: Measuring of Traffic Noise
Title: Room Acoustic for Eurovision Song Contest 1990 in Zagreb
Title: Ultrasound Transducer as PZM
Title: A Real Transfer Characteristic of Ship Communication
Sound-Tube
Title: Ship Communication Sound-Tube
Title: Recent Acoustic Sensors
Title: Comparison of Channel Codes
Title: Corelation of Subjective and Objective Distortion
Measurements
Title: Interconnecting Digital Audio Equipment
Title: Comparison of the perception of the early reflection in
the simulated and real conditions
Title: Dependence of the localization of the sound source on
microphone configuration
Title: Dependence of reproduction quality on acoustic room
characteristic
Title: Estimation of the minimal coefficient IAKK in the
simulated room
Title: Dependence of speech intelligibility upon bandwith of
transfer channel
Title: Measurement of perceptibility of simulated early
reflection in real room
Title: Comparison of anechoic room ETC given by impulse and TDS
methods
Title: Valuation of minimal coefficient IACC necessary for
localization
Title: Valuation of minimal coefficient IAKK in real room
Title: Digital audio measurements
Title: Prefessional Audio Equipment
Title: Comprising of Croatia in DAB - New Communication
Technology
Title: New possibilities of information transmitting through RDS
Title: TDS fundamentals
Title: Using TDS in acoustical measurements
Title: Room Acoustic of the EEF Zagreb
Title: Measurements of static and dynamic distortions
Title: Acoustical measurements in the laboratories of the
Brodarski institut,Faculty of Electrical Engineering and Končar Institute
in Zagreb
Title: Speech spectrum analysis in He/O2/N2 diver breathing
mixture
Title: Diver Communication Systems
Title: Magnetic Counter Effects to the Sound Stimulation of the
Ear
Title: Application of mettalic glass at hydrophones
Title: Integrated microphones
Title: Digital microphone
Title: Directional microphone
Title: Measurements of acoustics properties of materials
Title: Audio test signal
Title: Digital audio signal processing in radiocommunications
Title: Problems of loudspeaker-amplifier interface
Title: Possible way of construction and renovation of demaged and
destroyed fund of the individual housing construction
Title: Some discussion points on the prospects of the
construction of brick buildings
Title: Simulation of Sound Pressure Distribution in Roon
Title: Evaluation of Reverberation Time
Title: The Public Warning System
Title: Projecting of Acoustic Filters with Method of Distributed
Parameters
Title: Acoustic Quality of Multipurpose Halls
Title: Room's Frequency Response
Title: Dependence of PZM Characteristics upon Boundary Surface
Title: Ultrasound Transducers
Title: Application of Active Method for Noise Reduction
Title: The influence of Tiredness on Localization of Sound Source
Title: The Influence of Hearing Basis Expanding on the Sharpness
of Sound Source Localization
Title: Frequency Characteristic of Early Reflection
Title: Compound Acoustics: A Short Cut to Studio Construction
Title: Data Compression in Digital Audio Transmission
Title: Cage sound absorber
Title: Integrated Sound Absorber
Title: Method for shifting the frequency of signals
Title: Remote control device for controlling apparatuses carried
on the body,in particular hearing aids
Title: Hearing aid for persons with an impaired hearing faculty
Title: Signal processing
Title: Hearing aid
Title: Hearing aid
Title:
Title: The Measurement and Estimation of Objective and Subjective
Quality of Audio Systems and Equipment
Faculty: Elektrotehnički fakultet Zagreb
Date of defense: 10/26/92
Language: hrvatski
Number of pages: 164
Summary: Die wesentliche Information, die Sprach oder
Musiksignal
beschreibt, befindet sich in den Transienten. Die Transienten
sind schnelle, peak-asymetrische Signale, bei denen die
Gleichspannungskomponiente fehlt. Die Funktion der
Wahrscheinlichkeitsdichte der Amplitude eines Sprach oder
Musiksignal ist die bekannte Gauss-Kurve. Die normierte Schnelle
der Anderung eines Sprach oder Musiksignals uberschreitet den
Spitzenwert von 100 mV/us/V nicht. Aufgrund von diesen
Parametren und bekannten Mesmeethoden, die zum Messen von
verschiedenen Verzerrungen vorgeschen sind, aber auch bestimmte
Mangel aufweisen, wurde ein Generator von besonders zusammen-
gesetztem Audio Test Signal (ZATS=SATS) konstruiret. Dadurch
wurde eine neue Mesmethode zum Messen von nichtlinearen
stationaren und dynamischen Verzerrungen vorgeschlagen.
ZATS wird durch das Mischen von drei gegeneinander
unabhangigen verwickelten Zagezahn-Signalen (VZZS=SPS)
zusammengesetzt. VZZS ist eigentlich eine Reihevon "Zahnen" die
alle gleiche Amplituden haben, aber von der veranderlichen Dauer
sind. Das wiederholbare Element von VZZS ist eine Sequenz von 63
Zahne. Die Wiederholungsfrequenz dieser Grundsequenz bestimmt die
Grundfrequenz des VZZS - Spektrums.
Das zusammengesetzte Audio-Test Signal (ZATS) ist, durch
seine peak und Halbwellenaszmetrie, sowie asymetrischer
Distribution der Veranderungsschnelle, sehr empfindlich
gleichzeitig gegenuber alle stationare und dynamische
nichtlineare Verzerrungen. Die Dichte der
Wahrscheinlichkeistfunktion der zeitlichen Distribution ist sehr
ahnilich der die fur Sprache bzw. Musik gilt. Die Verzerrungen
konnen sowohl in der Zeit als auch in der Frequenzdomane gemessen
werden.
Als Mas fur die stationare und dynamische Verzerrungen kann
man die algebraische Differenze von den Eingengs und
Ausgangssignals verweden. Je grosser die algebraische Differenz
von beiden Funktionen ist, desto grosser ist auch die
algebraische Differenze von der Flachen unter beiden Funktionen,
so das auch der Mittelwert der Funktionendifferenz grosser ist.
Das beduetet das die stationare und dynamische nichtlineare
Verzerrungen eine groser Gleichspannungskomponente generierte
haben. Das Polaritate der Gleichspannungskomponente (GK) gangt
der Ibertragungskurve und des Polaritats des Aussteuerungssignals
ab.
Das ZATS - Spektrum und die normierte Veranderungsschnelle
kann man nach Belieben wahlen und dadurch die Mesempfindlichkeit
von Nichtlinearitaten steigern.
Durch die grose Ahnlichkeit von ZATS und Sprache bzw. Musik
die gemessenen Verzerrungen korrelieren gut mit dem subjektivem
Gefuhl.
Title: The influence of acoustical properties of space on sound
source localization
Faculty: Elektrotehnički fakultet Zagreb
Date of defense: 04/25/91
Language: hrvatski
Number of pages: 227
Summary: Es wurde nachgewiesen deá auch sehr fruhe Ruckwurfe
einen
gewissen Einfluá nicht nur auf die subjektive
Schallquellenausdehnung und Timbre, sondern auch auf die
Lokalisationsscharfe, haben.
Ebenfalls wurden Zusammenhange zwischen dem Raumgefuhl und
Lokalisationseffekten nachgewiesen.
Durch eine binaurale Meámethode hat man den minimalen
Koeffizient der interauralen Kreuzkorrelation (MIKIAKK), bei dem
eine Reflexion gerade lokalisierbar wird, gemessen. Mit der
selben Methode hat man auch den maximalen Koeffizient (MAKIAKK),
bei dem eine Reflexion gerade nicht mehr lokalisierbar ist,
gemessen.
Anhand von MIKIAKK und MIKIAKK wurde der Wertder IAKK fur
das subjektive diffuse Schallfeld ermittelt.
Eine Kopfnachbildung (mit zwei PZM Mikrofonen), die auch fur
die Stereo-Wiedergabe uber Lautsprecher geeignet ist, wurde
vorgeschlang und gepruft.
Title: Acoustical Characteristics of Wideband Loudspeaker Systems
Faculty: Elektrotehnički fakultet Zagreb
Date of defense: 12/23/93
Language: hrvatski
Number of pages: 98
Summary: The results of analiytical, numerical and experimental
investigation of microwave varactor tuned oscillators are
presented. A theory for analysing negative-resistance oscillators
is described. Varactor package analysis has shown that in wide-
band tuned oscillators varactor must be driven in a resonant
mode. Power suck-cut is explained for parallel andseries
oscillators as varactor resonant power absorption.
Criteria for avoiding power suck-out defined. A qualitative
comparison of Gunn and Impatt diodes for wide-band tunad
oscillator applications shows the adventage of Gunn diodes. From
consideration Gunn diode package, the neccesarz condition for
tuning Gunn diode oscillators is derived. teh measurement of Gunn
diode impedance is performed. Reactance compensation and coupling
of varactor and Gunn diode are described as a besic technique for
designing electronically tuned oscillators. A possibelity for
adopting reactance compensation in a series waveguide oscillator
is described.
Finally, design rules for electronically tuned oscillators
are derived. The results of numerical and analytical design of
a series waveguide oscillator are confirmed in experimental
setup. Wide-band tuning (12,3%) in X-band full-height waveguide
oscillator is achieved.
Title: Sound emition from ship's hull
Faculty: Elektrotehnički fakultet Zagreb
Date of defense: 02/26/90
Language: hrvatski
Number of pages: 81
Summary: In Ch. 1 the main characteristics of sound sources,
their
location onboaard ships and paths of sound propagation from the
sources to the surrounding fluid are briefly describd. The diesel
engine is considered to be main source of noise. Concerning the
paths of propagation, machinery noise can be classified into
structure-borne and airborne noise.
Since the structure-borne noise usually dominates, in Ch.
2 mechanisms of sound generation and propagation through the
elements of ship structure-beams and plates are discussed. The
analysis is focused on bending waves since they are of greatets
signifcance in the process of soun radiation. More attention has
been paid to the plates because they are more efficient radiators
of sound than beams. The main differences in frequency responses
of finite and infinite plates are described, too.
In Ch. 3 the influence of the surrounding fluid on a
vibrating strucrure is presented. There are two main effects:
fluid loading (reactive load) and radiation of sound (resistive
load). These effects are explained by two exaples-finite and
infinite plates. The main quantities describing radiation, e.g.
radiation coefficient "o", are given, too.
Chapter 4 is direct continuation of the previous one and
they both are the core of the thesis. The calculation procedure
of the radiation coefficient, used later on, is described. An
example of calculated and measured results of radioated sound is
given illustrating the fact that a well-establisehed
model,irrespective of how simple it is, can give fairly good
results useful in future work.
In Ch. 5 the above-described procedure is applied on a small
fishing vessel. The part of the of the vessel s hull responsible
for the sound radiation in the fluid is, from accoustical point
of view, approximated by flat ribbed plate. Because of the
complexity of building material (sandwich panel) there was need
for certain approximation. Using same measured results (impulse
response of the hull) as input data, the frequency band within
which a sandwich plate behaves like homogeneous one is
determined. Comparting the calculated and measured results of
sound pressure in the surrounding fluid it is possible to see
that this approximation fits well into the complete model. The
chapter closes with the comparison of calculated sound presure
in the surrounding fluid for a GRP (glass reinforced plastic) and
a steel vessel. It is assumend that the vessels are completly
equal with the same vibration velocity level at fluid-hull
boundary. The steel hull appered to be a more effecient radiator
of sound.
The last chapter presents a detailed description of the
measured object and the measurement itself. The measured and
calculated results of sound pressure in the surrounding fluid for
three more regimes of the main diesel engine are given. The
measured velocity levels on the hull below the main engine and
in the immediate vicinity of it are used as input date for the
calculation. They have a direct influence on the precision of the
obtained results. Due to complexity of the building material, the
input impedance of the hull was measured in order to pllroximate
a sandwich panel with a homogeneous flat plate of proper
thickness.The verification of the model is done using the
measured sound pressure levels in the surrounding fluid which
were taken simultaneously with the vibration velcity levels on
the hull. At the end of the chapter the mean absolute errors for
different regimes are given in order to make possible final
judgement of the entire model.
Title: Measurement of traffic noise
Faculty: Elektrotehnički fakultet Zagreb
Date of defense: 01/28/94
Language: hrvatski
Number of pages: 115
Summary: This paper with the problems of traffic noise,
focusing on
the road traffic. Main characteristics of the road traffic nois
have presendted togethre with a review of parameters.
Sources of noise, and the ways of its spreading have been
analysed.
Methods of anticipating the nois level, as well as the up-
to-date methods of measurement and assessment of the traffic nois
are described.
A number of currently valid standards and regulations
referring to traffic noise have been presented.
Measurements of the road traffic noise encumbrance in the
city of Zagreb, have been performed, and the measured results
analysed.
Based on all the analyses made, this paper offers in the end
the guidelines on reducing the road traffic noise.
Keywords: Traffic noise, equivalent noise level, traffic noise load, vehicle as a noise source, noise evaluation, decrease of road traffic noise level
Title: Problems of underwater sound standards
Faculty: Elektrotehnički fakultet Zagreb
Date of defense: 10/14/92
Language: hrvatski
Number of pages: 81
Summary: Standard hydrophones are needed in national legal
metrology
to maintain the measurement unity and publicity in the field of
industrial applicatione of high energy ultrasound, ulstrasonic
diagnostics, operatics and therapy in medicine, ultrasonic non-
destructive testing, acoustical emission, civil and military
applications of sonar and other. The underwater sound pressure
measurand is transferred by meane of standard hydrophones in
electrical signals. Standard hydrophones are calibrated and
maintained locally, by means of one of absolute methods, by
measurement of electrical and mechanical quantitiee and
(frequency), which are traceable to national standards of those
quantities. The standard hydrophone basical characteristics is
the frequency dependence of the sensitivity, which is to be
determined by calibration. The reciprocity principle gives besis
for the hydrophone calibration in the whole freguency range of
interest. The three transducer method is used for frequencies up
to 2 MHz. For higher frequencies modifications (e.g.
selfreciprocity) are needed because of the more precise spatial
hydrophone positioning. An analysis of existing calibration
procedures has shown that the TDS, combined with a precise
postioning system should be the underwater sound standard basis
frequencies up to 10 MHz. It has been experimentally verified
that the methods and procedures taken into concern here could be
used for calibration of a high-quality in the, at the time
acchieved, but theoretically also wider, frequency range,with the
accouracy comparable to those acchived in other laboratories in
the world.
Title: Design of wideband ultrasonic transducers
Faculty: Elektrotehnički fakultet Zagreb
Date of defense: 05/06/93
Language: hrvatski
Number of pages: 110
Summary: The three well known and nowadays the most employed
for the
ultrasonic transducers design have been studied: Mason s, KLM and
lattice model. The aim of the work ie the construction and the
optimization of the 2MHz wideband ultrasonic transducer for
medical diagnostics application, eas achieved by using the ID KLM
model computer simulation. In such a way the acoustical to water,
absorptive backing and electrical matching to generator was
performed so as to achieve minimum insertion loss and maximum
bandwidth assuring high detection signal good spatial resolution.
The four theoretical approches whit the basic mathematical
methods for the calculating of the pressure field radiated by a
planar source vibrating in an infinite regid baffle have been
considered and the convolution method has been used for detailed
sound field analysisfor several idealized types of transducers,
as well. In order to calculate the piezoelectric disk deformation
and therefore to predict the realistic sound field shape, the 2D
finite element method computer simulation has been applied.
Additionally, the influence of partial electrodes on the
radiation surface deformation and the sound field shape has been
studied, too. The two types of 2.7MHz broadband ultrasonic
transducers with fullyand partially electroded piezoceramic
disks, respectively, have been manufactured ensuring the two
different sound field types. The experimental results for the
sound field shapes, the acoustical impulse shapes and the
elektrical impedances match well with theoretical predictions.
The achived efficiency was about 34%, round trip insertion loss
25dB and 35.4dB, respectively, and the mechanical quality factor
4 and 5.7, respectively.
Title: Problems of piezoceramic array element in acoustical
visualization in water and material
Faculty: Elektrotehnički fakultet Zagreb
Date of defense: 03/06/91
Language: hrvatski
Number of pages: 123
Summary: In this thesis an analysis of imaging is made from the
point
of view the basis cell of the acoustical part of a visualization
system, i.e. array transducer element.
The abave-mentioned topic is discussed in the following chapters:
- Acoustical visualization
- Quality of acaustical imaging
- Acoustical field and beam patterns of arrays and
transducers
- Mesurement tehniques and calibration
- Basic theory of piezoceramic arry element
The capter on acoustical visualization is divided into two
sections, underwater acoustical visualization and ultrasonic
echoscopy. Their basic characteristics as well as similarities
and dissimilarities are discussed in the chapter. The chapter on
the quality of acoustical imaging considers the basic parameters
affecting that quality which are determined by the acoustical
components of an acoustical visualization system. In the chapter
an acoustical field and beam patterns of array element of the
system, the calculation methodology is presented, the importance
of these parameters is underlined and their relation to
resolution, sensitivity and range as parameters of acoustical
part of the system determining acoustical imaging quality of the
whole acoustical visualization system is considered.
Then in the follwing chapter the importance of measurement
techniques and calibration for obitaining reliable date about
transducers and arrays is discussed. The concluding chapter
presents basic theory of piezoceramic array element with special
reference to its component parts and methods of modeling a
transducer element and its designing. Finally, a method of
selecting transducer elements for composing an arrays is
considered
Title: Data transmission through hydroacoustic channel
Faculty: Elektrotehnički fakultet Zagreb
Author: AGANOVIĆ IZET
Date of defense: 12/23/91
Language: hrvatski
Number of pages: 79
Summary: The possibilites of reliable date transmission through the
sea
are investigated. On the basis of the general communication
system model, an underwater communication system is analysed. The
analysis of the sea water as the information channel is
emphasized. The phenomena ofsound propagation in the sea water
are described and examined, and the main restrictions on the
reliable date transmission are identified, namely, multipath and
fading. The statistical characterization of the hydroacoustic
information channel is also given.
On the basis of the channel characterization, the problem
of the signal desing for the use in such a channel is introduced.
The signal and its detection in an ideal and multipath
environment are investigated.
The possibilities of improving the date transmission
reliablity by proper error correcting coding are briefly
discussed.
Instead of conclusion, the mesures and techniques for
obtaining a reliable acoustic underwater link are proposed.
Title: Underwater voice communications
Faculty: Elektrotehnički fakultet Zagreb
Date of defense: 05/29/90
Language: hrvatski
Number of pages: 133
Summary: Problems related to the wireles underwater
communications
betwenn divers, by means of voice generation, transduction,
transmission and perception, are considered.
The causes of speech quality deterioration in free-diving
conditions are defined. Helium speech distortion is laboratory
simulated and its characteristics and comprehension is examined.
Transposition of speech formants at normal and various pressures
is mathematically derived. A survey of possible methods of helium
speech corrections is given.
Diver microphone construction and specially developed
calibration methods are described and some of the results are
shown.
A review of speech deterioration causes in a phase of
transmittion is sistematized, considering the sound signal losses
and ambient noise as main sources. Some possible types of
modulation are analysed. A high quality diver telephone
construction is described as well as the psychacoustic testing
methods for the whole wireless communication chain.
Human underwater hearing quality is analyzed. A diver
underwater earphone construction is outlined along with some
possible calibration methods and results obtained upon developed
models.
Title: Computers in music
Faculty: Elektrotehnički fakultet Zagreb
Date of defense: 10/07/91
Language: hrvatski
Number of pages: 118
Summary: The first part of this Work is concerned with problems
of
computer technology use in production, processing & archiving of
sound, i.e. music. Here, techniques of the sound production
itself & sequencer as the input-process.archive MIDI date base,
are dealt with.
In the chapter about synchronisation, all kind of
synchronisation used today is described (MIDI, SMPTE, MTC).
Through some of the best programms for interactive
composition, I have explained here in a way, the new method of
composing, algorithmic composition.
The second part of this Master s Degree Work contains
detailed description of work mode & use of MIDI (Musical
Instrument Digital Interface). With regard to its great
historical & technological importance, some of the practical use
of MIDI compatibile devices & directions of development of the
music technology connected with MIDI, have been included.
I have also thoroughly displayd the most modern music
computer system Synclavier 9600.
At the of this work I have witten programmes which are
performed on ATARI 1040 ST computer.
Title: Performance testing and verification of digital transient
waveform recorders
Faculty: Elektrotehnički fakultet Zagreb
Date of defense: 06/25/90
Language: hrvatski
Number of pages: 106
Summary: Digital Transient Waveform Recorders are widely used
in
number of modern communication and measurment systems. In this
paper the issue of their performance verification and measurement
has been addressed. First a typical TWR architectures are
analyzed. This serves as and introduction for the formation of
the real life system error model. Based on this model the main
error sources have been identified. Special attention is given
to the theoretical background and to the links between:
quantization noise, sampling time jitter, number of effective
bits, and DFT based noise floor measurement.
Different measurement methods have been evaluted in order
to define the minimal test set required for an accurate
performance verification. Special attention is given to the
Number of Effective Bits measurement. As a part of it s
descrtption an improved algorithm for fast initial parameter
estimation is introduced. The method ensures fast convergence of
nonlinear curve fitting algorithams. Finally the Multisine the
Multisine test signal is proposed as the excitation signal for
the transfer function measurement.
Title: Anticipation of Room Acoustic Quality
Faculty: Elektrotehnički fakultet Zagreb
Author: FAJT SINIŠA
Date of defense: 10/27/94
Language: hrvatski
Number of pages: 105
Summary: Aiming to anticipate the room acoustic quality, it is
mandatory to define its objective and subjective parameters. The pattern to
determine interrelationship between subjective and objective parameters
necessary for room acoustic quality assessment is presented in this paper.
Knowing of on closed room acoustic processes is a precondition for adequate
mathematical model to simulate room acoustic quality. Auditorium, studio
and control room acoustic quality is presented. Room acoustic measuring is
necessary to verify simulated room quality. To this aim knowledge of modern
meassuring methods is compulsory. Owing to computer approach and its
graphics and analitical software guidance, room acoustic quality can be
simulated. The presented simulation derived from mathematical model raise
the possibility of simulating other room acoustic qualities; considerable
necessary simplifications and limitations inclusive.
Keywords: room acoustic quality parameters, anticipation of room acoustic quality, room acoustic qulaity assessment, acoustic theories, acoustic quality simulation, room acoustic measuring
Title: The Judgement of Room Acoustic Quality
Faculty: Elektrotehnički fakultet Zagreb
Author: KRHEN MILJENKO
Date of defense: 05/26/94
Language: hrvatski
Number of pages: 124
Summary: For real judgement of room acoustic quality knowing of all
relevant parameters is necessary. All parameters that have influence on
acoustic quality of spaces with different purposes (speach, music) are
examined. The influence of room volume, room shape and total absorption on
reverberation time, which figures out speach intelligibility and hearing
event, is studied. The influence of noise on room acoustic quality, as well
as on people who work and live in those spaces, is also studied.
Relationship between real parameters of sound field and hearing event is
shown. For real judgement of room acoustic quality, some acoustic
measurements are compulsory. Therefore, mathematical fundamentals of some
acoustic measurements (mesuring of ETC diagram, impulse response, time
delay spectometry) are shown. The acoustic project for two real rooms was
made, as well as several defferent acoustic measurements. Theoreticall
obtained results and real conditions were compared. For the purpose of
acoustic measurements, and music production, some rooms with precisely
determined characteristics are used. This characteristics are also
presented.
Keywords: room acoustics, reverberation time, speach inteligibility, noise, impulse response, time delay spectometry, ETC diagram, special acoustic rooms
Title: Sound emition from ship's hull
Faculty: Elektrotehnički fakultet Zagreb
Date of defense: 02/26/90
Number of pages: 81
Author: Mirković mr. Goran
Degree level: M.A.
Title: Measurement of traffic noise
Faculty: Elektrotehnički fakultet Zagreb
Date of defense: 01/28/94
Number of pages: 115
Author: Vrnoga mr. Ivan
Degree level: M.A.
Title: Problems of underwater sound standards
Faculty: Elektrotehnički fakultet Zagreb
Date of defense: 10/14/92
Number of pages: 81
Author: Komeštik mr. Vladislav
Degree level: M.A.
Title: Design of wideband ultrasonic transducers
Faculty: Elektrotehnički fakultet Zagreb
Date of defense: 05/06/93
Number of pages: 110
Author: Zajec mr. Damir
Degree level: M.A.
Title: Problems of piezoceramic array element in acoustical
visualization in water and material
Faculty: Elektrotehnički fakultet Zagreb
Date of defense: 03/06/91
Number of pages: 123
Author: Svilar mr. Dragoljub
Degree level: M.A.
Title: Data transmission through hydroacoustic channel
Faculty: Elektrotehnički fakultet Zagreb
Date of defense: 12/23/91
Number of pages: 79
Author: Vukadin mr. Predrag
Degree level: M.A.
Title: Underwater voice communications
Faculty: Elektrotehnički fakultet Zagreb
Date of defense: 05/29/91
Number of pages: 133
Author: Bucak mr. Tino
Degree level: M.A.
Title: Computers in music
Faculty: Elektrotehnički fakultet Zagreb
Date of defense: 10/07/91
Number of pages: 118
Author: Roško mr. Mladen
Degree level: M.A.
Title: Performance testing and verification of digital transient
waveform recorders
Faculty: Elektrotehnički fakultet Zagreb
Date of defense: 06/25/90
Number of pages: 106
Author: Skendžić mr. Veselin
Degree level: M.A.
Title: The Measurement and Estimation of Objective and Subjective
Quality of Audio System and Equipment
Faculty: Elektrotehnički fakultet Zagreb
Date of defense: 10/26/92
Number of pages: 164
Author: Maletić Dr. Mladen
Degree level: Ph.D.
Title: The influence of acoustical properties of space on sound
source localization
Faculty: Elektrotehnički fakultet Zagreb
Date of defense: 04/25/91
Number of pages: 227
Author: Ivančević Dr. Bojan
Degree level: Ph.D.
Title: Acoustical characteristic of wideband loudspeaker systems
Faculty: Elektrotehnički fakultet Zagreb
Date of defense: 12/23/93
Number of pages: 98
Author: Mateljan Dr. Ivo
Degree level: Ph.D.
Title: Anticipation of Room Acoustic Quality
Faculty: Elektrotehnički fakultet Zagreb
Mentor: SOMEK BRANKO
Date of defense: 10/27/95
Number of pages: 105
Author: Fajt dipl.ing. Siniša
Degree level: M.A.
Title: The Judgement of Room Acoustic Quality
Faculty: Elektrotehnički fakultet Zagreb
Mentor: SOMEK BRANKO
Date of defense: 05/26/95
Number of pages: 124
Author: Krhen dipl.ing. Miljenko
Degree level: M.A.
Title: PAE - Local Stereo Studio
Title: Electronics in diagnostic and therapy of speech and
hearing disturbances
Title: Publishing for computer and informatic science
Title: Project Eurosong, 1990
Title:
Title:
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Title: Measurnig of vibrations in "Tvornica ulja i margarina"
Zagreb
Title: Project of acoustical reconstruction of theatre "Nitron"
in Saratov
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