[Top] [All Lists]

Re: contact mic

Subject: Re: contact mic
From: "Aaron Ximm" aaron_gmail
Date: Sun Oct 1, 2006 12:24 pm (PDT)
On 9/30/06, faza.rm <> wrote:
> I am doin this installation for a gallery. There will be a subwoofer inth=
> middle of the gallery
> and a pile of sand around it.. the viewers are required to walk on the
> sand..
> I am trying to buy contact mics and burry them in the sand so that the
> sounds of their
> footstep will be picked up and transmitted to the speaker...
> However the contact mics that  i got does not seem to be as senstive as i
> thought it would
> be.. i am just fixing them onto the floor..

This a great question for the phonography and perhaps lowercase-sound
mailing lists, where more people do this kind of work...

I would first try bonding the mics to a large thin sheet of metal and put
the sand over that. A tight coupling will let the sheet act as one large
sensative receptor. You still may find you need a lot of gain however.

Australian sound artist Joel Stern told me recently about an altoids-tin bo=
he got as a direct-in (DI) box for using piezoelectric contact mics, he
called it a preamp but I was wondering if was doing impedance matching sinc=
it changed the frequency response of his piezos. He got it from someone
online for around US$25, but I don't remember what they're called, alas.



  83% happy
   9% disgusted
   6% fearful
   2% angry

<Prev in Thread] Current Thread [Next in Thread>

The University of NSW School of Computer and Engineering takes no responsibility for the contents of this archive. It is purely a compilation of material sent by many people to the naturerecordists mailing list. It has not been checked for accuracy nor its content verified in any way. If you wish to get material removed from the archive or have other queries about the archive e-mail Andrew Taylor at this address: andrewt@cse.unsw.EDU.AU