Speaker

Details Speaker Speaker

1999-05-28

2000-10-31

Kuntz, Curtis A.

Electrical audio signal processing systems and devices

Electro-acoustic audio transducer

Electromagnetic

381190, 181171, H04R 2500

Patent

active

061414298

ABSTRACT:
A speaker has a structure such that vibrations of a ring-shaped vibrator are reliably damped by ensuring contact between the rim of the vibrator and a bottom of a groove provided in a supporting member, even in a hot and moist environment. A ring-shaped rim of a vibrator is secured in the bottom of the groove formed in the supporting member, via a doughnut-shaped double-sided tape. The groove is filled with urethane resin which is hardened. Even when the urethane resin is expanded in a hot and moist environment, the vibrator does not rise up from the bottom of the groove. Consequently, the vibrations of the vibrator are reliably damped, the desired excellent impedance characteristics are obtained, and as a result, evenness of sound waves is ensured.

REFERENCES:
patent: 5802196 (1998-09-01), Nakamura
patent: 5896460 (1999-04-01), Nakamura et al.

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