声学基本概念.pdf

文档介绍：: .
given position
Ι2
P2
r2 2
Ι1 P p
Ι=2 =
r 4πρr c
P 1
Power: P [W]
Intensity: Ι [J/s/m2] = W/m2
Pressure: p [Pa = N/m2]
BA 7666-11, 6 861218/2Propagation of Sound
t = 0
Compression
t = 1/4 T
t = 1/2 T
Extension
t = 3/4 T
Minimum compression Maximum compression
t = T
No compression
BA 7666-11, 7Sound Pressure
Pressure
[Pa]
100 000
Pascal
Time
BA 7666-11, 8 860504/1Sound Pressure
Pressure
[Pa]
New York
Atmospheric
Pressure
100 000
Pascal
Mexico City
Acoustic
Pressure
Variations
BA 7666-11, 9Range of Sound Pressure
Pressure, p
[Pa]
100
10
1



1
01
BA 7666-11, 10 860505/2 : .
Basic Concepts of Sound