SCIENCE 1117 CU 2

ultrasonic frequencies

• under 20,000 khz
• above 20,000 Hz
• sound speed

pitch

• shock wave
• temperature
• depth of tone

346 m/sec

• speed of sound in air at 75 degrees C
• speed of sound in air at 0 degree C
• speed of sound in air at 25 degrees C

sonic boom

• amount of energy in a sound wave
• tends to return to former state after being disturbed
• shock wave produced by objects moving faster than the speed of sound

infrasonic frequencies

• pitch
• sonic boom
• infrasonic frequencies

measurement of intensity

• speed of sound in air at 0 degree C
• watts/cm2 or decibels
• between 20 Hz and 20,000 Hz

intensity

• depth of tone
• above 20,000 Hz
• amount of energy in a sound wave

331 m/sec

• amount of energy in a sound wave
• speed of sound in air at 0 degrees C
• longitudinal wave motion produced by a disturbance in an elastic medium

elastic medium

• longitudinal wave motion produced by a disturbance
• elastic medium
• depth of tone
• amount of energy in a sound wave

audible frequencies

• depth of tone
• between 20 Hz and 20,000 Hz
• amount of energy in a sound wave