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1. 发明专利

BR9700908A 未知
公开(公告)号：BR9700908A
公开(公告)日：1998-12-08
申请号：BR9700908
申请日：1997-02-06
申请人： YANG YI FU
发明人： YANG YI-FU
IPC分类号： H04R1/28 , H04R3/04 , H04R5/00
摘要： An acoustic transmission line speaker enclosure with concentric cylindrical structures establishes acoustic coupling between a rear-traveling sound wave and a surrounding air mass. Inherent rigidity or high bending resistance of the cylindrical structure allows use of very thin walled cylinders without a massive and large overall enclosure. According to one aspect of the invention, an outer-most one of said cylinders includes wall structures adapted for coupling the rear-traveling sound wave therethrough to the surrounding air mass in phase with a forward-traveling sound wave from said speaker enclosure. An audio amplifier tunable to a listening room removes very low narrow frequency band components of an audio signal. Listening room cavity resonance is measured by injecting a frequency-varying sound wave into the listening room while detecting peak sound energy within the room. The filter the eliminates from the audio signal frequencies associated with listening room cavity resonance.

2. 发明专利

GB2310104A Loud speaker enclosure and tunable audio reproduction apparatus 未知
公开(公告)号：GB2310104A
公开(公告)日：1997-08-13
申请号：GB9700453
申请日：1997-01-10
申请人： YANG YI FU
发明人： YANG YI-FU
IPC分类号： H04R1/28 , H04R3/04
摘要： An acoustic transmission line speaker enclosure 10, has concentric cylindrical structures 20, 30 which establish acoustic coupling between a rear-travelling sound wave and a surrounding air mass. Inherent rigidity or high bending resistance of the cylindrical structures 20, 30 allows use of very thin walled cylinders without a massive and large overall enclosure. An audio amplifier 218, 220, 230, 232 tunable to the resonant frequency of a listening room 212 removes very low narrow frequency band components of an audio signal produced by the speaker enclosures 10a, 10b and the listening room 212 cavity resonance is measured by injecting a frequency-varying sound wave into the listening room 212 while detecting peak sound energy within the room, the filter then serves to eliminate frequencies associated with listening room cavity resonance from the audio signal by way of a filter 220 associated with the amplifier.

3. 发明专利

FR2759526A1 Transmission line loudspeaker enclosure for use with tunable audio reproduction equipment 未知
公开(公告)号：FR2759526A1
公开(公告)日：1998-08-14
申请号：FR9701549
申请日：1997-02-11
申请人： YANG YI FU
发明人： YANG YI FU
IPC分类号： H04R1/28 , H04R3/04
摘要： The enclosure (10) has concentric cylindrical structures (20,30) each defining an acoustic space (21,31). The spaces are in communication with each other via an end reflector (32) to establish an acoustic coupling between a rear-travelling sound wave (18) from a speaker driver cone (12), and a surrounding air mass. The sound wave eventually passes along the outer enclosure wall (26) leaving the bottom opening (27) of the enclosure. An audio amplifier (218,220,230,232) tunable to the resonant frequency of a listening room (21) removes very low narrow frequency band components of an audio signal produced by the speaker enclosures (10a,10b) and the listening room cavity resonance is measured by injecting a frequency-varying sound wave into the listening room while detecting peak sound energy within the room. A filter (220) eliminates frequencies associated with the measured resonance.

4. 发明专利

GB9700453D0 Loud speaker enclosure and tunable audio reproduction apparatus 未知
公开(公告)号：GB9700453D0
公开(公告)日：1997-02-26
申请号：GB9700453
申请日：1997-01-10
申请人： YANG YI FU
IPC分类号： H04R1/28 , H04R3/04

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