Invention Grant
- Patent Title: Audio playback system
- Patent Title (中): 音频播放系统
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Application No.: US12302870Application Date: 2007-05-28
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Publication No.: US08068617B2Publication Date: 2011-11-29
- Inventor: Taro Katayama , Tsuyoshi Haga
- Applicant: Taro Katayama , Tsuyoshi Haga
- Applicant Address: JP Osaka
- Assignee: Panasonic Corporation
- Current Assignee: Panasonic Corporation
- Current Assignee Address: JP Osaka
- Agency: Greenblum & Bernstein, P.L.C.
- Priority: JP2006-152447 20060531
- International Application: PCT/JP2007/060825 WO 20070528
- International Announcement: WO2007/139065 WO 20071206
- Main IPC: H04B1/00
- IPC: H04B1/00 ; H04R5/00

Abstract:
Provided is an audio playback system, which reduces a restriction on a place of installation and which reduces the dispersion of characteristics of sound pressures in a low frequency range due to the seats in a passenger interior of a vehicle so that a comfortable bass sound can be enjoyed at any seat. The audio playback system comprises a first filter (108), to which an audio signal outputted from a playback apparatus (107) is inputted, configured to pass a frequency band lower than a first-order resonance frequency of the passenger interior of the vehicle, a first sub-woofer (104) configured to receive an output signal of the first filter (108), a second filter (109), to which the audio signal from the playback device (107) is inputted, configured to pass a frequency band including the first-order resonance frequency of the interior, and a second sub-woofer (105), to which an output signal of the second filter (109) is inputted, configured to be installed near a node of a first-order resonance mode of the interior.
Public/Granted literature
- US20090190773A1 AUDIO PLAYBACK SYSTEM Public/Granted day:2009-07-30
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