PMID: 7334171Nov 1, 1981Paper

Forward-masking AP tuning curves in normal and in acoustically traumatized ears

The Journal of the Acoustical Society of America
M P Gorga, P J Abbas

Abstract

Compound action potential tuning curves (APTC's) were developed in a series of normal and acoustically traumatized cats. Probe frequency was set to 4 kHz ad probe level was set to 15-20 dB SL re: AP threshold for both normal and impaired ears. In addition, normal ears received the probe tone at a level of 70-75 dB SPL. Probe-elicited AP amplitude was measured in a forward-masking paradigm as a function of both masker level and frequency. Results indicated that the sharpness of the APTC's (defined by Q 10) was unaffected by acoustic trauma. The relative difference between required masker level on the tail and at the tip was reduced for the noise-damaged ears. Thus sharpness around the tip was essentially normal yet low-frequency energy was more effective at masking high-frequency region in these impaired ear. When slope of the decrement in normalized, probe-elicited AP amplitude-versus-masker level functions are calculated for different frequency maskers, normal ears showed a frequency dependence such that low-frequency maskers resulted in the steepest slopes with progressively less steep slopes as masker frequency increased. Some of the noise-damaged ears did not show this same frequency dependence. Specifically, the slopes of ...Continue Reading

Citations

Apr 1, 1984·Hearing Research·P J Abbas
Jan 1, 1985·Hearing Research·G K YatesB M Johnstone
Jan 1, 1987·Hearing Research·C J Brown, P J Abbas
Jul 1, 1994·Hearing Research· Supin AYaM B Tarakanov
May 20, 2006·The Journal of the Acoustical Society of America·Vladimir V PopovKexiong Wang
Nov 14, 2012·The Journal of the Acoustical Society of America·Alyson GruhlkeMichael P Gorga
Jan 11, 2013·International Journal of Pediatrics·Robert V Harrison
Sep 1, 1983·The Annals of Otology, Rhinology, and Laryngology·N T Shepard, P J Abbas
Feb 8, 2002·The Journal of the Acoustical Society of America·Michael P GorgaDawn Konrad-Martin
Apr 1, 1997·The Journal of the Acoustical Society of America·D A Nelson, A C Schroder
Feb 1, 1988·Clinical Physics and Physiological Measurement : an Official Journal of the Hospital Physicists' Association, Deutsche Gesellschaft Für Medizinische Physik and the European Federation of Organisations for Medical Physics·P J Abbas
Jan 1, 1990·Audiology : Official Organ of the International Society of Audiology·K R HenryJ M Prince
Jan 1, 1983·Audiology : Official Organ of the International Society of Audiology·P G Stelmachowicz, M P Gorga
Oct 19, 2000·Neuroscience and Behavioral Physiology·Y A Al'tman, N I Nikitin
Jan 2, 2003·The Journal of the Acoustical Society of America·Michael P GorgaEmily Cyr
Jan 1, 1991·Audiology : Official Organ of the International Society of Audiology·O Murnane, C W Turner
Jul 9, 2008·Neuroscience and Behavioral Physiology·A Ya Supin
Sep 1, 2005·Neuroscience and Behavioral Physiology·A Ya Supin

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