Speaker apparatus

Details Speaker apparatus Speaker apparatus

2005-06-07

2005-06-07

Mei, Xu (Department: 2644)

Electrical audio signal processing systems and devices

Electro-acoustic audio transducer

Electromagnetic

C381S111000, C381S117000, C381S396000, C381S400000, C381S412000, C381S406000

Reexamination Certificate

active

06904158

ABSTRACT:
In an electromagnetic induction type speaker apparatus, individual constants are set in such a manner that the following formula is satisfiedin-line-formulae description="In-line Formulae" end="lead"?N×(R1×R2)1/2/{2 Π×L1×(1−k2)1/2}≧20000in-line-formulae description="In-line Formulae" end="tail"?where R1is the DC resistance of a primary coil15: L1is the inductance of the primary coil15; N is the number of turns of the primary coil15; R2is the DC resistance of the secondary coil18; L2is the inductance of the secondary coil18; and k is the coupling coefficient of the primary coil15and the secondary coil18.In addition, the constants L1and L2are selected in such a manner that the ratio of the inductance L1and the inductance L2becomes equal to in the ratio of the DC resistance R1and the DC resistance R2.

REFERENCES:
patent: 2164374 (1939-07-01), Barker
patent: 4201886 (1980-05-01), Nagel
patent: 4300022 (1981-11-01), Hastings-James et al.
patent: 5841272 (1998-11-01), Smith et al.
patent: 6108433 (2000-08-01), Norris
patent: 06-292296 (1994-10-01), None

Affiliated with

Also associated with

Rating

Speaker apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3488185