Acoustic Characteristics of Insert-Earphone Versus External Earphone: Comparison through Sound Pressure Measurements in the Auditory Canal and Be'ke'sy Audiometry

Autor:	L. E. Sandberg, S. Scott Nielsen
Rok vydání:	1967
Předmět:	Sound (medical instrument) Frequency response medicine.medical_specialty Bekesy audiometry medicine.diagnostic_test Low-pass filter General Medicine Audiology Auditory canal Otorhinolaryngology High pitch medicine Audiometry Sound pressure Mathematics
Zdroj:	Acta Oto-Laryngologica. 64:179-186
ISSN:	1651-2251 0001-6489
DOI:	10.3109/00016486709139105
Popis:	The frequency response of an external earphone coupled to an ordinary earmould has been compared to a special insert-earphone, both through probe measurements of the sound pressure in the auditory meatus itself and through measurement of the threshold level with Bekesy audiometry. The insert-earphone gave in both cases a greater effect, 10–13 dB at frequencies above 3000 Hz. This is imputed among other things, to the elimination of the lowpass filter action in the sound channel of the ordinary earmould. An increase in the sound pressure level which could be attributed to a reduction of the remaining volume in the auditory canal, was not noted. A radical reduction of this volume would, for practical reasons, be difficult to obtain with the material available. The significance of the insert-earphone's better high pitch response has been discussed and the practical difficulties involved in its use have been mentioned.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::7cfc45f7dd0d12fe14e29f46fc2945b4 https://doi.org/10.3109/00016486709139105 Zobrazit plný text záznamu