EXAMPLES
- Voices-talking, yelling, whispering, singing
- Whistles
- Horns
- Music
- Instruments
- Animal sonar-high pitched frequency waves (dolphins, bats)
vocabulary
Sound energy: energy that comes from vibrating particles
Wave: disturbance that carries energy through matter or through empty space
Medium: any matter that waves travel through
Decibel: the units we use to measure how loud the sound is; it is abbreviated dB; a whisper is about 20 decibels, normal talking is about 60 decibels and a chainsaw is about 100 decibels
Sonar: a machine that uses reflected sound (echoes) to locate things; ships use it to find icebergs
Pitch: how high or low a sound is; determined by the frequency of the vibration
Vibration: small, rapid (quick) back and forth movement
Frequency: a measure of the amount of energy in a wave (the number of waves in a certain period of time, for instance, 20 waves per second)
Wave: disturbance that carries energy through matter or through empty space
Medium: any matter that waves travel through
Decibel: the units we use to measure how loud the sound is; it is abbreviated dB; a whisper is about 20 decibels, normal talking is about 60 decibels and a chainsaw is about 100 decibels
Sonar: a machine that uses reflected sound (echoes) to locate things; ships use it to find icebergs
Pitch: how high or low a sound is; determined by the frequency of the vibration
Vibration: small, rapid (quick) back and forth movement
Frequency: a measure of the amount of energy in a wave (the number of waves in a certain period of time, for instance, 20 waves per second)