kef5 diafan phys cgymn
DESCRIPTION
.TRANSCRIPT
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:..
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: ..
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(T):
(f):
(A): )
():
():
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():
()
()
() ():
1 :
1f = : f
= =
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():
()+
() ():
1 :
1f = : f
= =
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: ' .
f = =
:
(). (.. ( /).
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: =1 m :=1m :=1m/s
1 / 11m sf f Hzm
= = = =
5.1(102)
1m ( )
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, ..
,().
: 20 Hz :. 20Hz :. 20kHz
:,,.
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(m/s)
: , , .
(m/s)
(20C) 344:,,.
(20C) 999(20C) 1.330
.
(269C) 211(20C) 1.451
' '
(0C) 1.402(20C) 1.482 (100C) 1 543 .
(100C) 1.543
3.445.
3.480pyrex 5.170 5.790
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: ..
..
= 1400m/s t=4s t=4s.
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(decibel dB): (decibel,dB):
10dB10
20dB100=102
30dB1000=103
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: .
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: ,,..
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(1.000Hz)' .
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: ..
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().() . .