DUAL-DRIVE SPEAKER PROVIDED WITH DIFFUSION RESONANCE ATTENUATION

Japanese Patent JPH06113397

A

PURPOSE: To obtain a more uniform, that is, more constant output reply by configuring a speaker with 1st and 2nd piezoelectric drive elements and a means that couples an electric signal with the 1st and 2nd piezoelectric drive elements. CONSTITUTION: A loudspeaker phone 14 of a loudspeaker 10 has a throat end, a 1st piezoelectric drive element, and a cone diaphragm 22 is provided with two wires in a diverter 20 fitted nearly adjacent to the throat and used to couple an electric signal to the 1st piezoelectric drive element 22-1. Furthermore, the 2nd piezoelectric drive element 24-1 coupled with a 2nd diaphragm is arranged substantially in a diverter 16-2, and a 2nd wire pair is coupled with the 2nd piezoelectric drive element 24-1 to couple an electric signal with the 2nd piezoelectric drive element 24-1. Furthermore, an adhesive layer made of a 1st prescribed material and coupled with a 1st buffer is provided adjacent to an upper side to the piezoelectric drive elements, and a 2nd buffer on the 2nd piezoelectric drive element 24-1 is configured by an elastomer layer coupled with the piezoelectric drive elements.

RICHIYAADO GUREN FUOSUTAA

JP20701093A

April 22, 1994

July 30, 1993

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MOTOROLA INC

H04R1/26; H04R1/28; H04R1/30; H04R17/00; (IPC1-7): H04R17/00; H04R1/26; H04R1/28; H04R1/30

Masanori Honjo (1 person outside)

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