Wyniki wyszukiwania - Biblioteka Nauki

1

Automatic measuring system for head-related transfer function measurement

100%

Plaskota P.

Archives of Acoustics

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2008

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tom Vol. 33, No. 1

19-25

EN

In this paper the Head Related Transfer Function (HRTF) Automatic Measurement Equipment is presented. The system allows to measure HRTF with high spatial resolution within a considerably short time. The system employs many switched sound sources and a rotary chair. HRTF describes a transfer function of the human head and pinna and is unique for each human. Individual measurement of HRTF is necessary for applications where precise simulation of sound source localization is essential. An accurate determination of HRTF requires the position of sound source to be changed in the space surrounding test participants. It necessitates hundreds of measurements with high spatial resolution. The procedure becomes very time consuming and tiring for the participants.

2

Localization of areas of increased vibroactivity by means of the inverse method

80%

Stryczniewicz L.

Archives of Acoustics

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2007

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tom Vol. 32, No. 2

377-386

EN

Increased possibilities of parallel acquiring data and transforming them effectively together with the improvement of calculation tools made the inverse methods more important. Some examples of research, carried out by the author, during, which the possibilities of localization of increased vibroactivity areas were studied using the multi-microphone method, are presented in the paper. The theoretical basis of the inversion method of sound sources localization and certain laboratory test results are also given.

3

Akustyczny system rozpoznawania środowiska

60%

Kornatowski E.

Przegląd Elektrotechniczny

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2013

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tom R. 89, nr 5

257-259

PL

W artykule zaprezentowano system lokalizacji źródła dźwięku zbudowany z wykorzystaniem planarnej cztero – mikrofonowej matrycy mikrofonów. Rozwiązanie to może znaleźć zastosowanie w robotyce, w konstruowaniu samobieżnych robotów, jako jeden z elementów rozpoznawania otoczenia. Wyniki badań eksperymentalnych są niezwykle zachęcające. Błędy w lokalizacji źródła dźwięku wskazują na to, że proponowany system umożliwia lokalizację z precyzję niewiele gorszą niż ludzki słuch. Człowiek bowiem jest w stanie określić kąt azymutu akustycznego źródła z dokładnością ok. +/-6°.

EN

The paper offers a system for determination of sound source direction with a use of planar four - microphone matrix. This solution may be useful in design of robots, e.g. as one of the components for a recognition of surroundings. Obtained results of simulation tests are very encouraging. The errors shown in the paper prove that the system is able to localize the sound source direction as well as human ear. Based on sense of hearing, a human being is able to determine the azimuth within accuracy ca. +/-6°.

4

Dependence of the head-related transfer function on pinna flare angle

60%

Plaskota P. , Dobrucki A. B.

Elektronika : konstrukcje, technologie, zastosowania

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2009

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tom Vol. 50, nr 3

19-21

EN

Head Related Transfer-Function (HRTF) describes the modification of the spectrum of acoustic wave arriving to the ear. The HRTF influences sound source localization by auditory system. It has been proved that individual properties strongly influence HRTF. Application of HRTF which is different for each individual decreases the ability of sound source localization by the listener during headphones sound projection. The aim of the paper is the study of influence of pinna flare angle on the HRTF shape.

PL

Funkcja Transmitancji Odniesiona dp Głowy (HRTF) opisuje modyfikację widma fali akustycznej docierającej do ucha. HRTF wpływa na lokalizację źródła dżwięku przez system słuchowy. Zostało udowodnione, że cechy osobnicze silnie wpływają, na HRTF. Zastosowanie HRTF, które jest różne dla każdego słuchacza powoduje pogorszenie zdolności lokalizacji źródła dźwięku podczas odsłuchu przez słuchawki. Celem pracy jest zbadanie wpływu kąta odchylenia małżowiny usznej na przebieg HRTF.

5

Objectivization of Audio-Visual Correlation Analysis

51%

Kunka B. , Kostek B.

Archives of Acoustics

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2012

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tom Vol. 37, No. 1

63-72

EN

Simultaneous perception of audio and visual stimuli often causes concealment or misrepresentation of information actually contained in these stimuli. Such effects are called the "image proximity effect" or the "ventriloquism effect" in the literature. Until recently, most research carried out to understand their nature was based on subjective assessments. The authors of this paper propose a methodology based on both subjective and objectively retrieved data. In this methodology, objective data reflect the screen areas that attract most attention. The data were collected and processed by an eye-gaze tracking system. To support the proposed methodology, two series of experiments were conducted – one with a commercial eye-gaze tracking system Tobii T60, and another with the Cyber-Eye system developed at the Multimedia Systems Department of the Gdańsk University of Technology. In most cases, the visual-auditory stimuli were presented using a 3D video. It was found that the eye-gaze tracking system did objectivize the results of experiments. Moreover, the tests revealed a strong correlation between the localization of a visual stimulus on which a participant’s gaze focused and the value of the "image proximity effect". It was also proved that gaze tracking may be useful in experiments which aim at evaluation of the proximity effect when presented visual stimuli are stereoscopic.