Loudspeaker apparatus

Details Loudspeaker apparatus Loudspeaker apparatus

2011-05-31

2011-05-31

Kuntz, Curtis (Department: 2614)

Electrical audio signal processing systems and devices

Electro-acoustic audio transducer

Having acoustic wave modifying structure

C381S150000, C381S337000, C381S421000

Reexamination Certificate

active

07953240

ABSTRACT:
A loudspeaker apparatus comprises a housing, an adsorptive material provided inside the housing, for physically adsorbing gas inside the housing, a vibration section including a diaphragm and provided in an opening formed in the housing, a drive section for driving the diaphragm to generate sound from the diaphragm, and a negative stiffness generating mechanism provided inside the housing, for reducing an acoustic stiffness inside the housing, the acoustic stiffness acting on the diaphragm.

REFERENCES:
patent: 4657108 (1987-04-01), Ward
patent: 6574346 (2003-06-01), Tanaka
patent: 2000-308174 (2000-11-01), None

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