Question

properties of sound waves
intensity

intensity - the amount of energy the wave carries per second through a unit of area.
__________ increases with increased energy
measured in ________ per square meter ________

loudness - describes what you actually hear.
though not the same as __________, the greater the intensity of a sound wave, the louder it is.
measured in __________(db)
maximum __________ level is 85 db

frequency - the __________ of vibrations that occur per second
__________ changes with frequency
measured in __________(hz)
50hz = 50 vibrations per sec.

Explanation:

Intensity of sound - energy per second per unit area, measured in watts per square meter. Loudness is what is heard, related to intensity, measured in decibels (dB), with 85 dB being a maximum safe level for long - term exposure. Frequency is the number of vibrations per second, pitch changes with frequency, measured in Hertz (Hz).

Answer:

Intensity: energy per second per unit area, measured in watts per square meter.
Loudness: what is heard, related to intensity, measured in decibels (dB), maximum safe level is 85 dB.
Frequency: number of vibrations per second, pitch changes with it, measured in Hertz (Hz).