Anechoic chamber!!!
its really anechoic
omg!!!
i mean you can really feel the big difference between the outside world n in the chamber
even once u jst stepped into the chamber
will post up some photos of the chamber tmr cos gotta save my data caps at home
will use the uni's data caps instead.hahaha^_^
we were then shut in the chamber for quite some time
i guess probably half an hour or so
feeling i have...
gost its eerie to walk on those wired mesh
cos it doesnt have a floor !!! i mean literally a solid floor
cos they need to have the chamber being anechoic
so having a solid floor will reflects the sound wave (ie creating echo)
the all 6 faces of the chamber are covered with spongy wedges
be aware...its not a flat spongy surface
the wedges are placed into a special orientation tho
reason: to let the sound wave diffuse into the wedges slowly else the wave will bounce back slightly if have a flat surface
so can you actually hear SOUND???
yes you can actually
subjective sound from the outside (not sure subjective or objective,gotta revise my lecture later)
jst that the decibels too low and did not reach the threshold of our hearing decibels
so when some 1 talk directly to you and backing you
you can actually hear the sound level difference
direct louder than backing you (and you still can hear the ppl talking even though he's backing you)
y is it so???
because the sound wave doesnt travel in straight line like light wave
there's a refraction therefore you can hear it too
when we step into the chamber we can fell a pressure building up in the ear
y???
because our ear getting the signal of we are in a new environment so the ear bone retract to provide a safety precautions. therefore pressure built up
when you step out of the chamber and the lecturer still talking as the same sound level
but you actually hear it become louder then it was in the chamber
y???
because our ear~which is one of the most sensitive part of our body actually ...erm cant remember wat the lecturer said..will have to do my revision..^_^
it's kinda like my notes of wat my lecturer said during the chamber visit (from my memory)
so i might get some of the stuff wrong
pls correct me if i got anything wrong ^_^
then we went to the reverberation chamber
it's a total opposite of the anechoic chamber
everything u said reflects back with lots of echo
it takes approximately 5s for the echo to disappear
difference from the anechoic chamber is tat a reverberation chamber has all solid and shinning surface.
heavy wall with all faces doesnt face directly to each other (all at some angle)
only then they will able to reflect the sound wave till very mess
and 1 last thing
dun think u will get to experience all these kida stuff if u study in malaysia
oh and the chamber was 1 of the best anechoic chamber (last time)
the chamber costed 9mil to built and 14 months full time of designing it @_@
it's really old now. probably in some other part of the world they have a better chamber
but i still think this i way dam cool
