Sound Flashcards
What is an acoustic variable?
A quantity that can change in response to sound waves
Acoustic variables include pressure, density, and distance.
What are the seven acoustic parameters?
- Period
- Frequency
- Amplitude
- Power
- Intensity
- Wavelength
- Propagation Speed
These parameters describe the characteristics of sound waves.
What is the unit of pressure in acoustics?
Pascals (Pa)
What is the unit of density in acoustics?
kg/cm³
What are the two types of waves in acoustics?
- Transverse Waves
- Longitudinal Waves
Transverse waves have particle motion perpendicular to wave propagation, while longitudinal waves have particle motion in the same direction as wave propagation.
What does amplitude measure in acoustics?
Concentration of force in an area
What does density measure in acoustics?
Concentration of mass in a volume
What is the formula for pressure?
Pressure = Force / Area
What is the formula for density?
Density = Mass / Volume
What are the biologic effects of sound waves?
The effects of the sound wave upon the biologic tissue through which it passes (ex: heat, pressure)
These effects can influence tissue properties and health.
What is ‘in-phase’ in wave interference?
When a pair of wave’s peaks occur at the same time and location
What is ‘out-of-phase’ in wave interference?
When a pair of wave’s peaks occur at different times, and so do their troughs
What is constructive interference?
The interference of a pair of in-phase waves results in the formation of a single wave of greater amplitude than either of its components
What is destructive interference?
The interference of a pair of out-of-phase waves results in the formation of a single wave of lesser amplitude than at least one of its components; out-of-phase waves of equal amplitude may cancel each other out
Fill in the blank: The measure of particle motion is known as _______.
Amplitude
