| (19) |
 |
|
(11) |
EP 0 390 758 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
13.11.1991 Bulletin 1991/46 |
| (43) |
Date of publication A2: |
|
03.10.1990 Bulletin 1990/40 |
| (22) |
Date of filing: 05.03.1990 |
|
|
| (84) |
Designated Contracting States: |
|
AT BE CH DE ES FR GB IT LI NL SE |
| (30) |
Priority: |
06.03.1989 SE 8900759
|
| (71) |
Applicant: Palmaer, Leif |
|
S-331 41 Värnamo (SE) |
|
| (72) |
Inventor: |
|
- Palmaer, Leif
S-331 41 Värnamo (SE)
|
| (74) |
Representative: Barnieske, Hans Wolfgang |
|
c/o H.W. Barnieske Patentbyra AB
P.O. Box 25
Turingegatan 26
S-151 21 Södertälje 1
S-151 21 Södertälje 1 (SE) |
|
| |
|
| (54) |
A microphone amplifier for contact microphones |
(57) To improve the clarity of speech recorded using a contact microphone (10), it is
proposed that preferably after passage through a pre-amplifier (11), the electric
signal from the contact microphone (10), shall be subjected to a treatment for modifying
its amplitude in a first signal processing unit (12) and to a treatment for modifying
its spectral structure in a second signal processing unit (13).