Imagine you want to recreate an acoustical environment that simulates outdoors. Outside (and away from any buildings, hills etc) there is nearly no reverberation. To recreate the same sounding space indoors we need to have an anechoic chamber, which will absorb almost all the sound. The strange thing is that this type of room sounds very unnatural to us, whereas we are completely comfortable with sound outdoors.
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Brian Martin
30/5/2010 06:37:10 am
Perhaps a featureless desert would be almost anechoic, assuming sandy ground in random bumps (non-flat). Outside of a desert, most "outdoors" would still have some selective reflections from hard surfaces - tree trunks, fences, building walls, hard ground/concrete/tar, or lakes. If you're doing building work outdoors, say hammering, you can hear the hammer blows echo back from nearby buildings.
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