Water 'shaker'

[Sjoerdcurry]

I'm looking for a device who can generate a controled presure pulse in water in a pipe system? Does anyone know if these devices excist? Company's???

Thanx,
Curry (The Netherlands)

 

[GregLocock]

Depends what sort of pressure you are looking for, and at what frequency. Sonar systems use them, and so do underwater seismic surveying systems, although I doubt you will be interested in the latter. Cheers

Greg Locock

 

[Sjoerdcurry]

The frequency's I'm looking at are not so high as sonar uses. I'm looking at frequenties below 500 Hz.

Pressures are all below 10e5 N/ m2

 

[GregLocock]

You basically need a waterproof loudspeaker. How much power do you need? Cheers

Greg Locock

 

[pheon]

A waterproof loudspeaker won't work, although a moving coil transducer (say a Ling shaker) driving a metal piston might do it. You only need around 20 um displacement to produce a 0.1 GPa plane wave at 500 Hz. A typical sonar transducer won't work as it can't move enough.

Broad Arrow Acoustics

http://home.attbi.com/~pheon