A circuit of the present invention is a driving circuit for driving a vibrator having a mechanical vibration system which resonates at a resonance frequency. The driving circuit outputs to the vibrator at least two signals of different frequencies which are included in a frequency range including the resonance frequency. The vibrator has a function of converting an electric signal into at least one of a sound and a vibration.

 
Web www.patentalert.com

< Method for the compositional analysis of polymers

< Speaker

> Speaker

> Speaker damper

~ 00242