AES E-Library

An Improved Audiometric Earphone

The TDH-39 earphone is used by various audiometer manufacturers as the acoustic transducer in clinical audiometry. While the pressure response versus frequency characteristic exhibited by this earphone is satisfactory for most audiometric applications, there are instances where special circuitry has to be utilized to smooth out the basic response curve of the earphone. In addition, the interaction of the ear (mechanical or real) significantly affected the response of the earphone at 5500 Hz. Discussions with various audiometer manufacturers led us to attempt to develop an earphone physically similar to the TDH-39 but one which would have a smoother pressure response versus frequency.

Author: Howard, Richard
Affiliation: Instrument Systems Corporation, Huntington, NY
AES Convention:31 (October 1966) Paper Number:491 Import into BibTeX

Click to purchase paper or login as an AES member. If your company or school subscribes to the E-Library then switch to the institutional version. If you are not an AES member and would like to subscribe to the E-Library then Join the AES!

This paper costs $20 for non-members, $5 for AES members and is free for E-Library subscribers.

Learn more about the AES E-Library

E-Library Location: (CD aes7)   /pp5768/pp6610/0460.pdf

Start a discussion about this paper!