Sound Waves (15, 3)

Equations:

B

I =

1

2

⋅ sm

2

v = ---

--⋅ ρ ⋅ v ⋅ ω

 

 

ρ

 

2

 

 

 

β

= 10 ⋅ LOG

I

ω = 2

⋅ π ⋅ f

-----

 

 

10

 

 

Example:

Given: sm=10_cm, ω=6000_r/s, B=12500_kPa, ρ=65_kg/m^3.

Solution: v=438.5290_m/s, I=5130789412.97_W/m^2, β=217.018_dB, f=954.9297_Hz.

5-60 Equation Reference