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Sounds from an oven shelf

Sun, 29/08/2010 - 11:04 — mnd22
Introduction
Get very strange sounds from an oven shelf.
Useful information
Kit List: 

Oven Shelf
String
(NB: CHaOS doesn't have this kit at the moment, needs finding for a particular event)

Frequency of use: 
1
Explanation
Explanation: 

Get very strange sounds from an oven shelf, Hang it from two pieces of string, wrap string around your knuckles. Hit the oven shelf. It will sound like big ben.

It is hard for a small thing like an oven shelf to create low frequency sounds because the air has time to flow around the vibrating shelf, so it doesn't have to form waves. So although the shelf is vibrating at low pitches they don't get transmitted to your ears.

For more see:
http://www.thenakedscientists.com/HTML/content/kitchenscience/exp/the-se...

Risk Assessment
Date risk assesment last checked: 
Mon, 02/01/2012
Risk assesment checked by: 
mnd22
Date risk assesment double checked: 
Wed, 14/03/2012
Risk assesment double-checked by: 
ak570
Risk Assessment: 

Hanging a vibrating oven shelf from two pieces of string wrapped around your knuckles, which are put in your ears.

Risks:

Minimal, but if fingers are pushed into ears with long nails it could cause some minor damage.

Control Measures:

Encourage children to put their knuckles, not their fingers, in their ears.

In case of accident:

Call a first aider.

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Images

Comments

Thu, 27/01/2011 - 23:03 — ak570

RA checked 27/01/11

RA checked 27/01/11

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