About vibration board run (the construction of vibration board)

Component of the sound that suppress report needs to put the vibration that suppress report certainly board. This is becomes by the ceramics suppressing report that already formed electrode and the plate agglutinate such as brass, nickel simple construction.

 

 

The vibration that suppress report board phonate mechanism

To the vibration that suppress report board bring to bear on voltage, the pottery and porcelain that suppress report can be pulled litre, but the plate of agglutinate won’t be adjustable bend however (graph (A) ) . Inflict is retrorse voltage, can bend to opposite way (graph (B) ) .

 

Input the signal that voltage direction changes each other, can appear repeatedly (A) and (the alternant condition of B) , generation sound wave (graph (C) ) .

 

The vibration that suppress report board phonate mechanism

 

 

Use the resonant effect of crust, give out bigger voice.

 

 

1.The sound of vibration board approachs peak value

 

 

2.The sound of the enlarge inside crust approachs peak value

 

 

3.Be based on resonant effect sound to press increase 10 ～ 20dB

 

 

About his encourage brace up type circuit and from encourage brace up type circuit

 

His encourage brace up type circuit

Of the microcomputer popularize his encourage brace up type predominate

 

Signal of ·IC substandard ministry is inputted

The drive that this signal place initiates ·→Phonate (rate of hair acoustic frequency is frequency of exterior signal source)
 

 

From encourage brace up type circuit

· and transistor, resistor makes oscillating circuit jointly

· brings to bear on volts d.c. causes vibration→Phonate (rate of hair acoustic frequency is frequency of vibration board resonance)

The buy inside · transistor, resistor→PKB series