Handheld device loudspeaker system

Details Handheld device loudspeaker system Handheld device loudspeaker system

2004-03-30

2008-03-18

Anderson, Matthew (Department: 2618)

Telecommunications

Transmitter and receiver at same station

Having particular housing or support of a transceiver

C455S569100, C455S575100, C381S335000

Reexamination Certificate

active

07346315

ABSTRACT:
Loudspeaker systems for handheld devices (2400, 2500) such as cellular telephones (100, 1400, 1600, 1900) are provided. The loudspeaker systems include at least one omnidirectional monopole loudspeaker (404, 1504, 1802, 1918, 1920) and at least one dipole loudspeaker (402, 1502, 1804, 1914, 1916). Filtering is used to compensate for differences between electric-to-acoustic signal transfer functions of the loudspeakers in order to achieve destructive interference of emitted audio in one direction and reinforcement in another direction. Various loudspeaker systems that are reconfigurable from directional mode, to omnidirectional mode are provided. Filtering is also used to add a frequency dependent phase to one signal in order to alter a direction of maximum sound pressure level. Two monopole-dipole pairs can be used to produce a stereo effect. The monopole and dipole loudspeakers can be housed in a detachable loudspeaker accessory (200).

REFERENCES:
patent: 1689149 (1928-10-01), McCloud
patent: 6198831 (2001-03-01), Azima et al.
patent: 6324380 (2001-11-01), Kiuchi et al.
patent: 6931140 (2005-08-01), Van Halteren et al.
patent: 7103393 (2006-09-01), Hwang
patent: 7263196 (2007-08-01), Aubauer et al.
patent: 2002/0028693 (2002-03-01), Johnson
patent: 2003/0003879 (2003-01-01), Saiki et al.
patent: 2004/0202338 (2004-10-01), Longbottom et al.
patent: 2006/0094378 (2006-05-01), Murray et al.
patent: 2006/0128440 (2006-06-01), Murray et al.
patent: 1 282 335 (2003-02-01), None
patent: WO 95/34184 (1995-12-01), None
patent: WO 02/078390 (2002-10-01), None

Affiliated with

Also associated with

Rating

Handheld device loudspeaker system does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Handheld device loudspeaker system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Handheld device loudspeaker system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3978383