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Title: Loudspeaker enclosure and process for generating sound radiation

Abstract: Both an improved loudspeaker enclosure and an improved acoustical process for generating sound radiation in a room is herein disclosed. Basically, the walls of the improved enclosure include a loudspeaker, and a sound transmission port for transmitting sound generated by the back of the loudspeaker cone into the room. The interior of the enclosure includes a tuned acoustical chamber for absorbing the even and odd harmonics of the system resonance frequency, and a compression chamber acoustically coupled at one end to the back of the loudspeaker cone. The compression chamber is acoustically coupled to both the tuned acoustical chamber and the transmission port of the enclosure walls by means of an acoustical coupling. When the transmission port is located in the back wall of the enclosure, the sound transmitted by the transmission port may be directed into and amplified by an acoustical structure formed by the back enclosure wall, the room floor, and the room walls, where it reflects and combines with the sound radiation generated by the front of the loudspeaker cone.


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Inventors: Clements, Philip R. (8710-R, Park La., Dallas, TX, 75231)
Smith, Donald R. (4044 Buena Vista, #215, Dallas, TX, 75204)

Application Number: 06/108371
Filing Date: 1979-12-31
Publication_date: 1983-02-15
Assignee: Clements, Philip R. (US)
Smith, Donald R. (US)

Primary Class(es): 181/151 181/156, 181/155, 181/199, 181/145, 181/296, 181/146
Other Classes: H04R1/28; H05K5/00
US Patent Ref:
2766839October, 1956BarushLoudspeaker system
2825419March, 1958Stephens, Jr.High fidelity speaker enclosure combination
2978060April, 1961RobertsLoudspeaker enclosure
2986229May, 1961Perkins, Jr.Loudspeaker enclosures
2994399August, 1961Zimmerman et al.Loud speaker system
3047090July, 1962PrudenTuned acoustical device
3412824November, 1968ArmstrongSpeaker cabinet enclosure
3690405September, 1972HanceLOUDSPEAKER SYSTEM HAVING BASS RESPONSE RANGE BELOW SYSTEM RESONANCE
3952159April, 1976Schott179/1EDucted port reflex enclosure
4128738December, 1978Gallery179/1ECompact transmission line loudspeaker system
4161230July, 1979Ripple181/148Loudspeaker equipment
4224469September, 1980Karson179/1EStereo speaker system

Other Refs: DE1024593DE2630547FR946134GB496619GB663734
February, 1958
January, 1978
May, 1949
December, 1938
December, 1951
Other References: "The Transmission-Line Loudspeaker Enclosure", Wireless World, May 1972.
"Loudspeaker Design", Audio, Feb. 1961.
"Reflex Enclosure", Radio Electronics, Nov. 1959.

Primary Examiner: Fuller, Benjamin R.
Assistant Examiner:
Attorney: Gifford, Van Ophem Sheridan And Sprinkle
Claims: