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1. US20090190773 - Audio playback system

Office United States of America
Application Number 12302870
Application Date 28.05.2007
Publication Number 20090190773
Publication Date 30.07.2009
Grant Number 08068617
Grant Date 29.11.2011
Publication Kind B2
IPC
H04B 1/00
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
1Details of transmission systems, not covered by a single one of groups H04B3/-H04B13/123; Details of transmission systems not characterised by the medium used for transmission
H04R 5/00
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
5Stereophonic arrangements
Applicants Panasonic Corporation
Inventors Katayama Taro
Haga Tsuyoshi
Agents Greenblum & Bernstein, P.L.C.
Priority Data 2006152447 31.05.2006 JP
Title
(EN) Audio playback system
Abstract
(EN)

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.