Sound and Acoustics

An echo is an example of

• refraction of light

• absorption of sound

• reflection of sound

• diffraction of waves

A high frequency sound wave will have this kind of pitch

• A low pitch

• A medium pitch

• A high pitch

• An ultra-low pitch

transmission of sound

• sound source, medium, receiver

• vibration, echo, frequency

• amplitude, wavelength, pitch

• noise, silence, distortion

intensity of sound

• Amount of energy in a wave; determined by the amplitude, relates to perceived loudness

• The frequency of the sound wave

• The speed at which sound travels through a medium

• The quality or timbre of the sound

Source of a sound wave

• Vibrations

• Silence

• Echo

• Frequency

Compression

• The part of a longitudinal wave where the particles of the medium are close together.

• The part of a transverse wave where the particles are far apart.

• The area in a wave where energy is lost due to friction.

• The point in a wave where the amplitude is at its maximum.

Sound is this type of wave

• transverse

• longitudinal

• surface

• electromagnetic

Reverberation

• repeated echoes of sound.

• a type of sound wave

• the speed of sound in air

• a musical instrument

When sound is absorbed by a material

• It is converted to heat energy

• It is reflected back

• It is transformed into light energy

• It is transmitted through the material

Ultrasound

• Sound waves with frequencies above 20,000 Hz.

• Sound waves with frequencies below 20 Hz.

• Sound waves that can be heard by humans.

• Sound waves with frequencies between 1,000 Hz and 10,000 Hz.