Electrical Audio Signal Processing Systems And Devices Patents (Class 381)
- Directional (Class 381/313)
- Programming interface circuitry (Class 381/314)
- Remote control, wireless, or alarm (Class 381/315)
- Frequency transposition (Class 381/316)
- Noise compensation circuit (Class 381/317)
- With vacuum tube amplifier (Class 381/319)
- Spectral control (Class 381/320)
- Wideband gain control (Class 381/321)
- Specified casing or housing (Class 381/322)
- Acoustic, nonairborne vibration sensing or counterwave emission (Class 381/71.2)
- From appliance (Class 381/71.3)
- Within cabin or compartment of vehicle (Class 381/71.4)
- Within duct (Class 381/71.5)
- Adjacent ear (Class 381/71.6)
- Particular transducer or enclosure structure (Class 381/71.7)
- Counterwave generation control path (Class 381/71.8)
- Spectral adjustment (Class 381/94.2)
- Interpolation (Class 381/94.4)
- Soft switching, muting, or noise gating (Class 381/94.5)
- Hum or ground loop (Class 381/94.6)
- Using signal channel and noise channel (Class 381/94.7)
- Peak limiting or pulsive noise compensation (Class 381/94.8)
- Feedforward circuitry for transducer compensation (Class 381/94.9)
- Body contact wave transfer (e.g., bone conduction earphone, larynx microphone) (Class 381/151)
- Driven diverse static structure (e.g., wall, sounding board) (Class 381/152)
- Having acoustic wave modifying structure (Class 381/337)
- With mechanical amplifier arrangement (Class 381/161)
- Detail of mechanical vibration coupling to transducer (e.g., tuned vibrating element) (Class 381/162)
- Having bi-directional transducer (Class 381/163)
- Thermal response to, or generation of, sound vibration (Class 381/164)
- By modifying fluid flow (Class 381/165)
- Having a fluid as a conducting element (Class 381/166)
- Housed microphone (Class 381/355)
- Microphone capsule only (Class 381/369)
- Plural or compound reproducers (Class 381/182)
- Having body supported structure other than on head (Class 381/385)
- Mounting or support feature of housed loudspeaker (Class 381/386)
- Having protective or sheilding feature (Class 381/189)
- Electrostrictive, magnetostrictive, or piezoelectric (Class 381/190)
- Having electrostatic element (e.g., electret, vibrating plate) (Class 381/191)
- Electromagnetic (e.g., dyynamic) (Class 381/396)
Foreign Patent Art Collections
- Voice recognition (381/42) (Class 381/FOR111)
- Word recognition (381/43) (Class 381/FOR112)
- Detection of speech in noise (381/46) (Class 381/FOR115)
- Signal to noise ratio enhancement (381/47) (Class 381/FOR116)
- Speech parameter display (381/48) (Class 381/FOR117)
- Speech pitch fundamental frequency (381/49) (Class 381/FOR118)
- Speech formant frequencies (381/50) (Class 381/FOR119)
Foreign Patent Art Collections
- Directional (381/68.1) (Class 381/FOR128)
- Frequency control (381/68.2) (Class 381/FOR129)
- Bone conduction (381/68.4) (Class 381/FOR130)
- Gain Control (381/68.3) (Class 381/FOR131)
- Spectacle (381/68.5) (Class 381/FOR132)
- Ear insert (381/68.6) (Class 381/FOR133)
- Hook over ear (381/68.7) (Class 381/FOR134)
- Specified casing or housing (381/69) (Class 381/FOR135)
- Having enclosure or housing (381/138) (Class 381/FOR138)
- With acoustic wave modifying structure (381/153) (Class 381/FOR140)
- Microphone (381/168) (Class 381/FOR147)
- Having body supported structure (e.g., earphone) (381/187) (Class 381/FOR150)
- With mounting or support feature (381/188) (Class 381/FOR151)
- Electromagnetic (e.g., dynamic) (381/192) (Class 381/FOR152)
- Electro-acoustical transducer mounting or support (381/205) (Class 381/FOR165)
