PARAMETERS OF SOUND

Parameter

measurable characteristic or quantity of sound.

Period

time it takes for 1 cycle to occur

ms

Period: Unit

T=1/f

Period: Formula:

Period

 "How long did that one cycle take?"

Frequency

"How many cycles can happen in 1 second?"

Frequency

The number of cycles per second

f=c/lambda

Frequency: Formula

Propagation speed

speed at which a sound wave travels through a medium

m/s or mm/microseconds

Propagation Speed: units

stiffness and density

The speed depends mainly on the properties of the medium, particularly/ two influences:

stiffness

how strongly a material resists being compressed or deformed.

eleasticity

stiffness is also

mass

density is also

rho/p

density unit (two)

e

stiffness unit

inverse

f and t relationship

inverse

f and wavelength relationship

direct

wavelength and propagation speed

direct

propagation speed and stiffness

inverse

propagation speed and density

pressure, densitym distance

3 PRIMARY ACOUSTIC VARIABLE

pressure

energy force

force per unit area of the concentration of force

Pascal

Pressure: Unit

Density

Mass per unit volume