Telephone with integrated hearing aid
An integrated telephone and hearing aid that has a single in-ear speaker is disclosed. The illustrative embodiments automatically adapt the operation of the hearing aid based on whether a telephone call is in progress or not. For example, when the user is not engaged in a telephone call, the illustrative embodiments function as a normal hearing aid. But when the user does become engaged in a telephone call, the illustrative embodiments alter the hearing aid function so that the user can hear the telephone call. For example, the illustrative embodiments attenuate the hearing aid function while a call is in progress so that the user can hear both the telephone call and retain some, albeit diminished, auditory input from the environment. This enables, for example, the user to still hear loud sounds (e.g., a car horn, a fire alarm, a person screaming, etc.).
1. An apparatus comprising:
a microphone for converting a first acoustic signal into a first electromagnetic signal s 1 (t);
a receiver for receiving a second electromagnetic signal s 2 (t);
a processor for generating a third electromagnetic signal s 3 (t) based on a 1 (t)·s 1 (t) and a 2 (t)·s 2 (t), wherein |a 1 (t)/a 2 (t)| changes based on whether or not said apparatus is engaged in a telephone call; and
a speaker for converting said third electromagnetic signal s 3 (t) into a second acoustic signal.
2. The apparatus of claim 1 wherein at least one of a 1 (t) and a 2 (t) changes based on s 1 (t).
3. The apparatus of claim 1 wherein |a 1 (t)/a 2 (t 1 ) |<|a 1 (t 2 )/a 2 (t 2 )| when:
(i) said apparatus is not engaged in at telephone call at time t 1 ,
(ii) said apparatus is engaged in a telephone call at time t 2 , and
(iii) a 1 (t 1 ), a 1 (t 2 ), a 2 (t 1 , and a 2 (t 2 ) are non-zero.
4. An apparatus comprising:
a first microphone for converting a first acoustic signal into a first electromagnetic signal s 1 (t);
a second microphone for converting a second acoustic signal into a second electromagnetic signal s 2 (t);
a receiver for receiving a third electromagnetic signal s 3 (t);
a processor for generating a fourth electromagnetic signal s 4 (t) based on a 1 (t)·s 1 (t), a 2 (t)·s 2 (t), and a 3 (t)·s 3 (t), wherein |a 2 (t)/a 3 (t)| changes based whether or not said apparatus is engaged in a telephone call; and
a speaker for converting s 4 (t) into a third acoustic signal.
5. The apparatus of claim 4 wherein at least one of a 1 (t), a 2 (t), and a 3 (t) changes based on at least one of s 1 (t) and s 2 (t).
6. The apparatus of claim 4 wherein |a 2 (t)/a 3 (t 1 )|<|a 2 (t 2 )/a 3 (t 2 )| when:
(i) said apparatus is not engaged in at telephone call at time t 1 ,
(ii) said apparatus is engaged in a telephone call at time t 2 , and
(iii) a 1 (t 1 ), a 1 (t 2 ), a 3 (t 1 ), and a 3 (t 2 ) are non-zero.