| |
 |
|
Class Information
Number: 381/354
Name: Electrical audio signal processing systems and devices > Electro-acoustic audio transducer > Having acoustic wave modifying structure > Absorbing or attenuating element
Description: Subject matter wherein undesired sound intensity or vibration is lessened.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 4246449 |
Electrostatic transducer having optimum sensitivity and damping |
Jan. 20, 1981 |
| 4235302 |
Loudspeaker |
Nov. 25, 1980 |
| 4232205 |
Microphone mount |
Nov. 4, 1980 |
| 4198550 |
Peripherally reinforced laminated loudspeaker diaphragm |
Apr. 15, 1980 |
| 4176249 |
Deleterious mechanical vibrations from dynamic loudspeaker offset by additional dynamic device |
Nov. 27, 1979 |
| 4167223 |
Mechanically operable acoustic filter |
Sep. 11, 1979 |
| 4156801 |
Pattern voice coil loudspeaker with baffles touching diaphragm |
May. 29, 1979 |
| 4156118 |
Audiometric headset |
May. 22, 1979 |
| 4146745 |
Loudspeaker enclosure with multiple acoustically isolated drivers and a common port |
Mar. 27, 1979 |
| 4139733 |
Electro acoustic transducer with improved diaphragm |
Feb. 13, 1979 |
| 4127749 |
Microphone capable of cancelling mechanical generated noise |
Nov. 28, 1978 |
| 4122302 |
Two way dynamic and electrostatic speaker enclosure with side vent for greater high frequency dispersion |
Oct. 24, 1978 |
| 4101736 |
Device for increasing the compliance of a speaker enclosure |
Jul. 18, 1978 |
| 4071717 |
Headphone earpiece |
Jan. 31, 1978 |
| 4069401 |
Acoustical frictional resistance construction and apparatus for manufacturing an acoustical resistance and an associated magnetic system |
Jan. 17, 1978 |
| 4058688 |
Headphone |
Nov. 15, 1977 |
| 4057124 |
Sound suppressor |
Nov. 8, 1977 |
| 4048454 |
Sonic transducer employing rigid radiating member |
Sep. 13, 1977 |
| 4035582 |
Tremolo effect producing system |
Jul. 12, 1977 |
| 4034165 |
Transducer with rearwardly disposed damping elements |
Jul. 5, 1977 |
| 4030564 |
Loud speaker with stable damping |
Jun. 21, 1977 |
| 4027117 |
Headphone |
May. 31, 1977 |
| 4020299 |
Electro-acoustic transducer diaphragms |
Apr. 26, 1977 |
| 3999020 |
Transducer with variable frequency response |
Dec. 21, 1976 |
| 3997739 |
Electrodynamic type electroacoustic transducer |
Dec. 14, 1976 |
| 3963881 |
Unidirectional condenser microphone |
Jun. 15, 1976 |
| 3953675 |
Audio speaker system |
Apr. 27, 1976 |
| 3930560 |
Damping element |
Jan. 6, 1976 |
|
|
|
