HEARING AID SYSTEMS

• US 3,659,056 A
• Filed: 11/13/1969
• Issued: 04/25/1972
• Est. Priority Date: 11/13/1969
• Status: Expired due to Term

• Current Assignee: Adolf C. Howorko, William B. Morrison
• Original Assignee: Adolf C. Howorko, William B. Morrison
• Inventors: Morrison, William B., Howorko, Adolf C.
• Primary Examiner(s): Claffy, Kathleen H.
• Assistant Examiner(s): Helvestine, William A.
• Application Number:
  US04/870,588
• Time in Patent Office: 894 Days
• Field of Search: 179/82,1B,107
• US Class Current: 381/315
• CPC Class Codes: H04B 5/00 Near-field transmission systems, e.g. inductive or capacitive transmission systems

Abstract

This invention relates to a hearing aid system for the education of deaf children, and permits the incorporation of such children in a class of normal children. The child carries a conventional hearing aid provided with an integral inductive audio-frequency signal pick-up loop. The child also carries an audio-frequency signal inductive transmitting loop of such size that it can be worn in close proximity to the pick-up loop of the hearing aid. The teacher uses a microphone coupled by a suitable transmission system to the inductive transmitting loop. Thus the standard hearing aid enables the child to hear both ambient noise and a relatively distant teacher, with both signals at convenient sound levels.

Claims

1. A hearing aid system comprising:

a. a microphone;

b. an amplifier arranged to receive an input from said microphone;

c. a radio transmitter modulated by an output of said amplifier;

d. a hearing aid adapted to be carried by a user;

e. an inductive audio-frequency-signal pick-up loop forming an integral part of said hearing aid;

f. an audio-frequency-signal inductive transmitting loop of such size that it can be carried by a user of the hearing aid in close proximity to said pick-up loop;

g. a radio receiver complementary to said radio transmitter and arranged to receive an output from the transmitter;

h. said radio receiver being of such size that it can be carried by the said user; and

i. said radio receiver being arranged to demodulate an input radio signal and to apply audio frequency signals to said inductive transmitting loop.

2. A hearing aid system according to claim 1 and in which said inductive transmitting loop is attached to said hearing aid in the proximity of the said pick-up loop.

3. A hearing aid system according to claim 1 and in which said inductive transmitting loop is in the form of a coil wound on a ferrite former.

4. A hearing aid system according to claim 3, and in which the ferrite former is in the form of a strip and the coil is wound around a longitudinal axis of said strip.