Referenced by|
| US4169219 | Mar 30, 1977 | Sep 25, 1979 | | Compander noise reduction method and apparatus | | US4190806 | Sep 20, 1978 | Feb 26, 1980 | Licentia Patent-Verwaltungs-G.m.b.H. | Circuit arrangement for the selective compression or expansion of the dynamic range of a signal | | US4388654 | Mar 17, 1981 | Jun 14, 1983 | RCA Corporation | Video disc player with selectively enabled audio signal expander circuitry | | US4446493 | Nov 12, 1981 | May 1, 1984 | Olympus Optical Co., Ltd. | Variable frequency-response equalizer | | US4514701 | Apr 4, 1983 | Apr 30, 1985 | | Automatic level control circuit | | US4586191 | Aug 9, 1982 | Apr 29, 1986 | Sanyo Electric Co., Ltd. | Sound signal processing apparatus | | US4696044 | Sep 29, 1986 | Sep 22, 1987 | | Dynamic noise reduction with logarithmic control | | US5278912 | Jun 28, 1991 | Jan 11, 1994 | Resound Corporation | Multiband programmable compression system | | US5371803 | Apr 7, 1992 | Dec 6, 1994 | BellSouth Corporation | Tone reduction circuit for headsets | | US5402086 | Dec 23, 1993 | Mar 28, 1995 | Samsung Electronics Co., Ltd. | Signal noise reduction system | | US5488668 | Nov 23, 1993 | Jan 30, 1996 | ReSound Corporation | Multiband programmable compression system | | US5701352 | Jul 14, 1994 | Dec 23, 1997 | BellSouth Corporation | Tone suppression automatic gain control for a headset | | US6795740 | Mar 1, 2000 | Sep 21, 2004 | Apple Computer, Inc. | Rectifying overflow and underflow in equalized audio waveforms |
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