Automatic telephone switch for hearing aid
First Claim
Patent Images
1. A method of hearing aid operation having first and second operational states, comprising:
- in the first operational state, inputting a first signal into the hearing aid;
processing the first signal;
outputting the processed first signal;
in the second operational state, automatically switching the hearing aid, in response to the hearing aid detecting a magnetic field, by activating a magnetic switch to make a first transistor turn off a microphone circuit and a second transistor turn on a voice coil circuit to input a second signal in place of the first signal;
processing the second signal; and
outputting the processed second signal.
4 Assignments
0 Petitions
Accused Products
Abstract
A hearing aid is provided with a switch that automatically switches the hearing aid input from a microphone input to a voice coil input in the presence of a magnetic field. The magnetic field can be generated by a magnet in a telephone handset.
151 Citations
13 Claims
-
1. A method of hearing aid operation having first and second operational states, comprising:
-
in the first operational state, inputting a first signal into the hearing aid;
processing the first signal;
outputting the processed first signal;
in the second operational state, automatically switching the hearing aid, in response to the hearing aid detecting a magnetic field, by activating a magnetic switch to make a first transistor turn off a microphone circuit and a second transistor turn on a voice coil circuit to input a second signal in place of the first signal;
processing the second signal; and
outputting the processed second signal. - View Dependent Claims (2, 3, 4, 5, 6)
-
-
7. A hearing aid system comprising a telephone handset and a hearing aid, said telephone handset having a magnet, and said hearing aid comprising:
-
a microphone adapted to output a first signal based on acoustic input, a voice coil pickup adapted to output a second signal based on electromagnetic input, a switching circuit having first and second transistor switches, the switching circuit connected to said microphone and said voice coil pickup, said switching circuit automatically transmitting the first signal with the first transistor switch conducting in the absence of a magnetic field produced by said magnet and automatically transmitting the second signal with the second transistor switch conducting in the presence of said magnet and with the first transistor turning off a microphone circuit that includes said microphone in the presence of said magnet;
a signal processing circuit connected to said switching circuit, said signal processing circuit receiving the signal transmitted by said switching circuit. - View Dependent Claims (8, 9, 10)
-
-
11. A hearing aid, comprising:
-
a first input unit adapted to output a first signal based on a first input;
a second input unit adapted to output a second signal based on a second input;
a signal processing circuit connected to said first input unit and said second input unit; and
an automatic switching circuit having a magnetic switch, a first transistor switch and a second transistor switch, the automatic switching circuit operatively connected to said first input unit by the first transistor switch and said second input unit by the second transistor switch, said automatic switching circuit having a default state wherein said first signal is received by said signal processing circuit and a switched state wherein in response to an external electromagnetic stimulus said second signal is received by said signal processing circuit, the magnetic switch controlling the first and second transistor switches to turn the first transistor switch off to turn off a circuit that includes said first input unit while turning the second transistor switch on. - View Dependent Claims (12, 13)
-
Specification