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Help please!!

 
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misscart



Joined: 17 Nov 2011
Posts: 2
Location: louisiana

PostPosted: Thu Nov 17, 2011 1:44 am    Post subject: Help please!! Reply with quote

Crowd noise in a football stadium seems to be louder in the night. Is it real or just feeling? Can you explain it in physical terms?

Cant figure out the answer...thanks for the help!
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hepcj
Site Admin


Joined: 23 Jun 2007
Posts: 125

PostPosted: Sun Nov 27, 2011 5:08 pm    Post subject: Reply with quote

Well there are two effects happening I would say. The first is psychological in that the noise appears to be louder because the background noise level can be lower at night. (fewer cars, few people, aircraft, etc.) and so our ears would have less difficulty in hearing quieter sounds.

Under certain conditions you may be able to hear the sounds at distances further away than normal. On cold nights, you can sometimes hear distant sounds more clearly because there is a temperature inversion (cold air, low to the ground and warmer air at greater heights.) Sound travels faster in the warm air and this has the effect of directing the sound waves back towards the ground as they move away from the source.
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