Information transmission system
Remote control system
Remote control receiver
Remote control transmitter
Wireless transmitting and receiving systems including ear microphones
Direct contact hearing aid apparatus Patent #: 4628907
ApplicationNo. 06/752909 filed on 07/08/1985
US Classes:381/315, Remote control, wireless, or alarm340/825.68, Shift register340/825.75, Permutation381/105, Remote381/320, Spectral control455/352, Remote control of receiver455/355Amplitude, volume, or gain control
ExaminersPrimary: Ng, Jin F.
Assistant: Byrd, Danita R.
Attorney, Agent or Firm
International ClassesH03G 1/02 (20060101)
H03G 3/00 (20060101)
H03G 1/00 (20060101)
H04R 25/00 (20060101)
Foreign Application Priority Data1984-07-18 AT
AbstractA hearing aid comprises a microphone, a battery-operated earphone, and amplifying circuit connected to the microphone output, the amplifying circuit including a frequency-selective circuit component and a sound level adjustment circuit component connected to the frequency-selective circuit component, and a remote sound wave control signal emitter circuit separate from the microphone, earphone and amplifying circuit and emitting sound wave control signals within the range of the microphone input.