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Autor:
Erwin Weiss
Publikováno v:
The Journal of the Acoustical Society of America. 87:2800-2800
An ear wax barrier for a hearing aid to prevent ear wax from contacting and damaging the internal components of a hearing aid or hearing aid receiver. The barrier includes a housing defining a central axis of passage, as well as a plurality of projec
Autor:
Erwin Weiss
Publikováno v:
The Journal of the Acoustical Society of America. 32:1582-1588
An air damped artificial mastoid has been constructed to simulate the mechanical impedance of the human mastoid. Viscoelastic substances extensively used in current mastoid designs are not employed. The instrument is virtually immune to aging effects
Autor:
Erwin Weiss
Publikováno v:
The Journal of the Acoustical Society of America. 32:924-924
For some time now devices have existed for automatically plotting the Nyquist amplitude phase characteristics of feedback devices where the significant frequencies were below 100 cycles. These devices were largely electro‐mechanical in nature. Ther