Wavelength of Sound Waves

• distance between successive crests

Amplitude of Sound Waves

• vertical height of the wave
• loudness or volume
• measured in decibels

Frequency of Sound Waves

• the number of cycles or waves passing a given point every second
• pitch
• measured in hertz (Hz)

Frequency of Human Hearing

• between 15 000 and 20 000 Hz

Speed of Sound

• 344 m/s at 20^oC in dry air (also called Mach 1)
• Sound travels faster in solids than in liquids than in gases