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Class Information
Number: 455/267
Name: Telecommunications > Receiver or analog modulated signal frequency converter > Local control of receiver operation > Tone control
Description: Subject matter including significant details of means whereby a part of the frequency range of the low frequency signals in an audio frequency amplifier of a receiver is emphasized or attenuated to produce a desired bass or treble effect thereby obtaining a quality more pleasing to the ear of a listener when the signals are reproduced.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7587223 |
Terminal for mobile phone and method for controlling the synchronism of terminal for mobile phone |
Sep. 8, 2009 |
| 7471702 |
Methods and apparatus for implementing, using, transmitting, and/or receiving signals at least some of which include intentional null tones |
Dec. 30, 2008 |
| 7389093 |
Call method, call apparatus and call system |
Jun. 17, 2008 |
| 7386306 |
Multi-carrier communications methods and apparatus |
Jun. 10, 2008 |
| 7313380 |
Variable resolution A/D converter |
Dec. 25, 2007 |
| 7310378 |
Estimating a transmission channel with pilot symbols distributed in lattice structure |
Dec. 18, 2007 |
| 7297756 |
Melt-adhesives for sealing off rocks or building materials |
Nov. 20, 2007 |
| 7212840 |
Cellular phone and incoming call reception informing method |
May. 1, 2007 |
| 7139567 |
Tone based command system for reception of very weak signals |
Nov. 21, 2006 |
| 6751470 |
Versatile RF front-end multiband mobile terminals |
Jun. 15, 2004 |
| 6433673 |
Digital enunciator, process and communication system employing same |
Aug. 13, 2002 |
| 6101257 |
Audio signal processor |
Aug. 8, 2000 |
| 6014551 |
Arrangement for transmitting and receiving radio frequency signal at two frequency bands |
Jan. 11, 2000 |
| 5680468 |
Methods of and systems for speaker equalization in automotive vehicles having convertible tops |
Oct. 21, 1997 |
| 5631714 |
Apparatus for automatically adapting the mean sound level of a television receiver |
May. 20, 1997 |
| 5530924 |
Radio station memory presets with stored audio effects |
Jun. 25, 1996 |
| 5524290 |
Adaptive graphic equalizer and radio using same |
Jun. 4, 1996 |
| 5448757 |
Audio signal modulating system with pre-emphasis |
Sep. 5, 1995 |
| 5438689 |
Radio receiver for a vehicle having improved audibility for speech |
Aug. 1, 1995 |
| 5263188 |
Fade compensated tone control method and apparatus |
Nov. 16, 1993 |
| 5241696 |
Tuner with selective equalization of different program sources |
Aug. 31, 1993 |
| 5228091 |
Loudness control circuit for selectively emphasizing both high frequency and low frequency components |
Jul. 13, 1993 |
| 4466118 |
Dual range audio level control |
Aug. 14, 1984 |
| 4454509 |
Apparatus for addressably controlling remote units |
Jun. 12, 1984 |
| 4320534 |
Loudness control circuit |
Mar. 16, 1982 |
| 4205274 |
Power amplifier circuit |
May. 27, 1980 |
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