What's this sound?

[rayhill75]

Hi, does anyone have sound analysing software? Can anyone identify this sound?

Link to sound below.

Really bugging me. Cheers.

http://cml.sad.ukrd.com/audio/36605.wav

[Radugazon]

Dunno either; it's a stereo file, the tracks are not a copy of each other but are almost identical. The spectral content is an ascending curve 100/3000 Hz. When stretching it, there are 5 events: 1 that is not a click starting the record, 2 & 3 are the main ones, more rich in high frequencies, 4 & 5 a kind of rebound that follow 3. There is no rebound after 2.

All this takes place in a very reverberant space, a kind of empty room.

Don't you have any more clues ?

[SY]

Billiards.

[pinkmouse]

Nah, too high pitched. Someone sliding a cupboard door bolt home?

[5th element]

The first click sounds like a latch being removed or something, that in turn releases an arm/lever that has been held in place under tension. When the latch is removed the arm then flies forwards and hits something. It's possible that the latch releases two arms and that the large twin spikes represent their initial impacts.

If we take Radugazon's image and look at it again, each large spike appears to be followed by a smaller spike(s). This could easily be a second impact caused by a rebound from the initial impact. Ie the latch removes an arm under tension, it flies forwards and smacks into something hard, the impact causes it to bounce back a tiny amount and then smack into the something hard again. The smaller spike(s) could also be reflections.

[Radugazon]

My bad, 5th is absolutely right, that becomes clearer after noise reduction, there are exactly 3 hear-able (?) kind of rebounds regularly spaced coming after the number 2. After the number 3, we can see one more, but it's impossible to ear it individualized from the 5th.
It can't be billiard, it makes me also thinking of a ball falling on some stairs, but it's definitively too fast.

The picture is a crop after adaptative noise reduction.

[stereodude27]

It sounds to me like an electronic door latch solenoid retracting the bolt releasing the latch.