Shattering glass with sound (Experiment 2)

I went out to buy some cheap-ass wineglasses from the local dollar shop. I can't believe they even dare to sell them, they look so ugly... I mean look at that fat bastard.

Anyway, I didn't even bother using the oscilloscope this time. I 'pinged' the glass and quickly matched that frequency with the synthesizer.

Being a bigger wineglass than the one used in the first experiment, I had expected the resonant frequency to be lower. And so it was, resonating at precisely 979 Hz. A medium volume test with a paper strip on the glass confirmed this: the paper jumped off.

This time I decided a 6W amp was not enough- I really wanted this thing to blast open! So I cut up a length of oxygen free copper cable to hook into the next room, where a 150W amplifier [right] was waiting (given to me by Charles).

Anyway yes, I said this video was better, and it is. I turned the volume on the amp about halfway, slid the preamp volume to near maximum, and pressed GENERATE!

Seeing as I was in another room with two closed doors between me and the death zone, I couldn't exactly see the action. Mr. Video Camera did though, and check it out... the wineglass promptly EXPLODED.

I came into the room to find glass shards everywhere...

Up to you which one you download.. high quality or low quality, but seeing as the sizes are quite similar I don't see why anyone would download the low quality...?

Lights, camera, action....

~High Quality videos~

Download the high quality video capture HERE [1.8mb WMV]

Download the SLOW MOTION (high quality) video HERE [1.2 WMV]

~Low Quality videos~

Download the low quality video capture HERE [1.0mb MPEG]

Download the SLOW MOTION (low quality) video HERE [0.6mb WMV]

1. This is at the stage just before explosion, You can see that the wineglass appears blurry because it is vibrating like crazy.

The paper strip has already jumped off a second ago.

A close up shot. The cracks inside the glass have extended to the bottom of the goblet. The glass tends to crack where it is weakest, and I guess you could tell this is a cheap wineglass by the shape of the end result...