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Class Information
Number: 181/151
Name: Acoustics > Diaphragm and enclosure > With sound-absorbing means
Description: Subject matter including sound absorbent material within the means to enclose the diaphragm for preventing undesirable effects.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 4437541 |
Controlled dispersion speaker configuration |
Mar. 20, 1984 |
| 4436178 |
Housing loudspeaker |
Mar. 13, 1984 |
| 4433749 |
Acoustic rear radiation absorption for loudspeaker systems |
Feb. 28, 1984 |
| 4429762 |
Horn loudspeakers of the sectorial diffusion type, and method for making said loudspeakers |
Feb. 7, 1984 |
| RE31483 |
Loudspeaker enclosure with enhanced bass response |
Jan. 3, 1984 |
| 4410770 |
Directional microphone |
Oct. 18, 1983 |
| 4395592 |
Ribbon loudspeaker |
Jul. 26, 1983 |
| 4379212 |
Electro-acoustic transducer |
Apr. 5, 1983 |
| 4376232 |
Electro-acoustic transducer |
Mar. 8, 1983 |
| 4373606 |
Loudspeaker enclosure and process for generating sound radiation |
Feb. 15, 1983 |
| 4356882 |
Device for enlarging the effective volume of a loudspeaker enclosure |
Nov. 2, 1982 |
| 4336861 |
Speaker system |
Jun. 29, 1982 |
| 4313521 |
Speaker housing |
Feb. 2, 1982 |
| 4312258 |
Battery powered electronic guitar |
Jan. 26, 1982 |
| 4301889 |
Speaker enclosure |
Nov. 24, 1981 |
| 4284844 |
Loudspeaker system |
Aug. 18, 1981 |
| 4281738 |
Spherical loudspeaker enclosure |
Aug. 4, 1981 |
| 4239090 |
High accuracy bass reproducer device |
Dec. 16, 1980 |
| 4213515 |
Speaker system |
Jul. 22, 1980 |
| 4189627 |
Electroacoustic transducer filter assembly |
Feb. 19, 1980 |
| 4167985 |
Speaker system |
Sep. 18, 1979 |
| 4161995 |
Loudspeaker housing forming a closed, damped system, particularly for automotive installation |
Jul. 24, 1979 |
| 4139075 |
Loudspeaker device |
Feb. 13, 1979 |
| 4139076 |
Loudspeaker enclosure with enhanched bass response |
Feb. 13, 1979 |
| 4136755 |
Loudspeaker system for a vehicle |
Jan. 30, 1979 |
| 4130174 |
Loudspeaker |
Dec. 19, 1978 |
| 4128738 |
Compact transmission line loudspeaker system |
Dec. 5, 1978 |
| 4127751 |
Loudspeaker with rigid foamed back-cavity |
Nov. 28, 1978 |
| 4123621 |
Acoustical speaker device |
Oct. 31, 1978 |
| 4101736 |
Device for increasing the compliance of a speaker enclosure |
Jul. 18, 1978 |
| 4044855 |
Loudspeaker device |
Aug. 30, 1977 |
| 4034165 |
Transducer with rearwardly disposed damping elements |
Jul. 5, 1977 |
| 4004094 |
Enclosure system for sound generators |
Jan. 18, 1977 |
| 3985200 |
Background sound system and apparatus for masking speech |
Oct. 12, 1976 |
| 3982607 |
Loudspeaker cabinet having an integrally constructed horn |
Sep. 28, 1976 |
| 3978941 |
Speaker enclosure |
Sep. 7, 1976 |
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