Localization of Sound Sources in Normal Hearing and in Hearing Impaired People

• Autorzy: Niewiarowicz M. , Kaczmarek T.
• Języki publikacji: EN

Abstrakty

EN

This article presents results of investigations of the angle of directional hearing acuity (ADHA) as a measure of the spatial hearing ability with a special emphasis on people with hearing impairments. A modified method proposed by Zakrzewski has been used – ADHA values have been determined for 8 azimuths in the horizontal plane at the height of the listeners’ head. The two-alternative-forced-choice method (2AFC), based on a new system of listeners’ responses (left – right instead of no difference – difference in location of sound sources) was the procedure used in the experiment. Investigations were carried out for two groups of subjects: normal hearing people (9 persons) and hearing impaired people (sensorineural hearing loss and tinnitus – 9 persons). In the experiment different acoustic signals were used: sinu- soidal signals (pure tones), 1/3 octave noise, amplitude modulated 1/3 octave noise, CCITT speech and traffic noises and signals corresponding to personal character of tinnitus for individual subjects. The results obtained in the investigations showed, in general, a better localization of the sound source for noise type signals than those for tonal signals. Inessential differences exist in ADHA values for particular signals between the two groups of subjects. On the other hand, significant differences for tinnitus signals and traffic noise signals were stated. A new system of listeners’ responses was used and appeared efficient (less dispersion of results compared to the standard system).

Słowa kluczowe

EN

localization of sound source; ADHA; angle of directional hearing; tinnitus; left-right answer system

• Wydawca: Instytut Podstawowych Problemów Techniki PAN ; Komitet Akustyki PAN ; Polskie Towarzystwo Akustyczne
• Czasopismo: Archives of Acoustics
• Rocznik: 2011
• Tom: Vol. 36, No. 4
• Strony: 683--694
• Opis fizyczny: Bibliogr. 14 poz., wykr.

Twórcy

autor

Niewiarowicz M.

autor

Kaczmarek T.

• Poznań University of Medical Sciences Department of Otolaryngology Przybyszewskiego 49, 60-355 Poznań, Poland,

Bibliografia

• 1. Blauert J. (1997), Spatial hearing: the psychoacoustics of human sound localization, MIT.
• 2. Cronbach L.J. (1990), Essentials in Psychological Testing, Ed. 5, New York Edition Herper Collins Publishers, p. 175.
• 3. Florkowski J. (1980), The importance of transient signals for the localization of sound sources [in Polish: Znaczenie przebiegów transjentowych w lokalizacji źródeł dźwięku], Ph.D. dissertation, A. Mickiewicz University, Poznań.
• 4. Hartmann W.M. (2000), How to localize sound, Physics Today, Nov., 24-29.
• 5. Hausler R., Colburn S., Marr E. (1983), Sound localization in subjects with impaired hearing, Acta Oto-Laryngol., 400, 1-62.
• 6. Jastreboff P.J., Hazel J.W.P. (1993), A Neurophysiological Approach to Tinnitus: Clinical Implication, Brit. J. Audiolol., 1-15.
• 7. Makarewicz R. (1994), Environmental noise [in Polish: Hałas w środowisku], Poznań, PWN.
• 8. Middlebrooks J.C. (1992), Narrow-band sound localization related to external ear acoustics, J. Acoust. Soc. Am., 92, 2607-2624.
• 9. Mills A.W. (1958), On the minimum audible angle, J. Acoust. Soc. Am., 30, 237-246.
• 10. Niewiarowicz M., Czajka J., Hojan E. (2005), Investigations on the angle of directional hearing acuity, Archives of Acoustics, 30, 2, 147-157.
• 11. Pruszewicz A. (1994), An outline of clinical audiolog [in Polish: Zarys audiologii klinicznej ], WAM, Poznań.
• 12. Snow J.B. (1997), Tinnitus: Theory and Management, BC Decker Inc.
• 13. Wightman F.L., Kistler D.J. (1997), Factors affecting the relative salience of sound localization cues, [in:] R.H. Gilkey, T.R. Anderson, Binaural and spatial hearing, LEA Publishers Mahvah, New Jersey.
• 14. Zakrzewski A. (1960), Clinical test for the acuity of directional hearing, Bulletin de la Societe des Amis des Science et de Lettres de Poznań, Serie c - Livraison X 9