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Content：

 Electro sound exciter for stimulating bending waves on plates. The unit can be attached to the surface of the plate by gluing or screwing.

Specs: 

impendance:    8ohm +-15% at 800 Hz 1.0V

min resonant  REQ 260+-20% Hz  ,    test condition:       without baffle 

power:    10W,MAX 15Watt

output  S.P.L :   +-3db At 600,800,1K,1.2K Hz  

Frequency  range:   F0-19 KHZ ,Average SPL+-10db

distortion:  5% Max at 1000HZ 10W

operation  termperature:  -20deg to 50deg

storage  temperature:  -40deg to 60deg

 

Make any flat rigid plate surface into a speaker with this electrodynamic exciter.

These are often used in things such as arcade/pub quiz machines where they are screwed directly onto the frame of the machine.

The exciter (or bodyshaker as they are sometimes known) is basically a loudspeaker without a membrane. It works by applying an audio signal to the contact pins, the oscillating mass then starts shaking with the frequency of the applied signal. This oscillation is transmitted to the mounting plate and from there on to the surface the exciter is stuck to. The surface then emits the audio signal just like a speaker!

There are some differences in how the sound is emitted compared to a speaker. The excited surface is very large and heavy (when compared to a lightweight cone membrane in a speaker), and thus unable to oscillate coherently. That means that not every point of the surface moves into the same direction with the same amplitude at the same time.