loading

Surface Agitation with out a transducer?

Well, i'm working on a sound project, the idea is simple, a metal sheet that is agitated by a speaker or a piezo. but it seems that the piezo and the speaker i'm using is still insufficient to shake the metal sheet, and i don't want to spent money importing a transducer from SparkFun.

So the question is, how can I do it? The speaker i'm using is 4ohm 6Wats, do i need a stronger one? if so, stronger ohmd or wats? or both?

sort by: active | newest | oldest
rickharris3 years ago

You need a reasonable bass speaker you don't mind wreaking.

http://www.thebuttkicker.com/butt-kicker-live

Remove the paper cone and bolt a heavy bit of steel to the voice coil. Cut the frame down.

This heavy speaker will rumble with the base from a suitable amp.

Often used by gamers to give more realism to action games.

butt kicker.jpg
Misac-kun (author)  rickharris3 years ago

This was the best awnser so far, thats me most efficient method to make a metal sheet vibrate with a speaker, but the metal sheet need to be light weight or else it will put too much stress on the voice coil just like on this ible

https://www.instructables.com/id/Mechanical-Wave-Dr...

In the comments you can see that

"I tried building this configuration for a high school physics project. The design works well, but after about 20-30 seconds of repetitive motion, the wave driver's magnetic coil stops working. The failure usually occurs at a frequency around 300Hz, even on low amplitudes. The first speaker produced a strong smell of burning metal when it burned out around 900Hz. So far, I have burned out three speakers. What am I doing wrong, and is there any way to ensure that this does not happen again if I build another one?


Thanks,
Alekxos"

That's what happen when you put too much stress on the voice coil.

Misac-kun (author) 3 years ago

I have Found Something intresting in the related Ibles, and found what i was looking for! a Vibrating Membrane, it's more energy efficient and that's what i was looking for since the begining.

You need a larger more powerful speaker and an amp to back it up. More power means more wattage.

Misac-kun (author)  mpilchfamily3 years ago

Gonna Try it today.