Sound Notes

Sound is a Wave Sound is a type of ____________________

Sound is a wave that is produced by a ___________________ and travels through matter.A ___________________is a rapid, back-and-forth

motion.Because the medium vibrates in the same direction as the wave travels, _____________________and ____________________.

How sound waves are produced.A vibrating object __________________ on the medium around it and sends out ___________________________________.Your vocal cords make sound waves.

The highest frequency that humans can hear is 20,000 hertz. Above 20,000 hertz the waves are called _______________

________________________________ Pitch depends on the ________ of a sound wave.Pitch is the ______________________ of a sound.A low-frequency wave with a _____ wavelength =

_____________.A high-frequency wave with a _____ wavelength =

_____________.

The motion of the source of a sound affects its pitch._____________ - the changing in perceived pitch that occurs when the source or the receiver of a sound is moving.

IHow the Ear Detects Sound

Sound waves vibrate particles The ____________ rapidly. The particles in

the air in front of the drum become compressed. When the drum moves the opposite way, a space opens up between the _____________. These are the compressions and _______________ which are Longitudinal waves.

Sound is a ______________wave (must have a _______________) and cannot travel through a vacuum (___________________).

Sound travels faster through __________ than in gases or ________.

Intensity Determines Loudness

Intensity of a sound is the ________________ the sound wave has.

A ___________ is the unit used to measure sound intensity.

________________ is the increasing of the strength of an electrical signal and is used to increase the intensity of a sound wave.

Intense sound can damage hearing.

Transverse Wave w/ High Amplitude

Transverse Wave with a Long Wavelength

Transverse Wave w/ a low frequency.

Transverse wave w/ little energy.

Transverse wave w/ little energy.

Transverse wave w/ a high pitch.

Longitudinal wave w/ high frequency

Longitudinal wave w/ high amplitude.