Electrical audio signal processing systems and devices – Noise or distortion suppression – Interpolation
Patent
1993-04-06
1994-12-20
Kuntz, Curtis
Electrical audio signal processing systems and devices
Noise or distortion suppression
Interpolation
381 88, 381 89, 381188, 181145, 181147, H04R 2500, H05K 500
Patent
active
053741242
ABSTRACT:
A loudspeaker system overcomes disadvantages of prior art systems. To adjust for undesirable room acoustics, high frequency slope compensation is provided which reaches its plateau well beyond the highest audible frequency, providing a more accurate audio reproduction. Electronic filtering increases the high frequency components beyond the audible range, to drive a single set of high frequency acoustical drivers to properly compensate for high frequency attenuation due to room acoustics. Alternatively, a dedicated high frequency acoustical driver provides the high frequency emphasis to compensate for room acoustics, with another set of high frequency acoustical drivers accurately reproducing the audio signal. A multi-compound Isobarik system is also taught, one embodiment utilizing a single internal baffle within a loudspeaker enclosure to allow acoustical drivers operating within similar frequency ranges to be physically located anywhere within the enclosure without limitation due to internal air pressure variations. Acoustical drivers of similar frequency ranges may be physically located at opposite ends of the loudspeaker system enclosure, making the speaker system less sensitive to room acoustics. Enclosure resonance significantly reduced by the use of cylindrical prisms as inexpensive structural elements. In one embodiment, a loudspeaker enclosure is formed of a plurality of subenclosures, allowing a loudspeaker system to be constructed of a plurality of simple elements. In one embodiment, each subenclosure has similar characteristics and is suitable as a loudspeaker system. Alternatively, various subenclosure types have different characteristics so various subenclosures of various characteristics are assembled to form a loudspeaker system of desired acoustical characteristics.
REFERENCES:
"Audio Cyclopedia", Howard M. Tremaine, 1969, p. 1156.
Caserza Steven F.
Cass Audio, Inc.
Kuntz Curtis
Tran Sinh
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