Energy of Sound Waves
The maximum distance the particles in a medium move from their rest positions.
What is amplitude?
pg 573
The distance between a point on one wave and the nearest point just like it.
What is wavelength?
pg 575
The transfer of energy by a wave to a medium through which it travels.
What is absorption?
pg 584
An ear that has three main parts including the inner, middle, and outer ears.
What is the human ear?
pg 568
An increase in amplitude that occurs when an object vibrating at its natural frequency absorbs energy from a nearby object vibrating at the same frequency.
What is resonance?
pg 578
How you perceive the energy of a sound wave.
What is loudness?
pg 574
The property of sound that increases as wavelength decreases.
What is frequency?
pg 575
The bouncing of a wave off a surface.
What is reflection?
pg 584
The part of the ear that collects sounds.
What is the outer ear?
pg 568
Type of interference in which a compression meets a rarefaction.
What is destructive interference?
pg 577
As this decreases, amplitude and loudness decrease.
What is intensity?
pg 574
The change of pitch when a sound source is moving in relation to an observer.
What is the Doppler effect?
pg 575
The movement of sound waves through a medium.
What is transmission?
pg 583
Part of the outer ear that directs collected sounds to the middle ear.
What is the ear canal?
pg 568
People who use their knowledge of sound transmission, absorption, and reflection to control sounds.
What are acoustical engineers?
pg 585
A sound with a decibel level of 20.
What is a whisper?
pg 574
The frequency of one vibration per second.
What is a hertz (Hz)?
pg 575
The speed at which sound waves travel
What is 343 m/s?
pg 584
A structure like a drumhead in the human ear that may cause hearing loss when torn.
What is the eardrum?
pg 569
An image produced by an ultrasound scanner based on reflected waves.
What is a sonogram?
pg 588
The more energy you put in your voice, the farther this move as they vibrate back and forth.
What are air particles?
pg 573
Frequencies that are above the range of human hearing.
What is ultrasound?
pg 575
Too much of this can make words hard to hear.
What is reverberation?
pg 585
Infection or loud sounds can cause damage to tiny hair cells in this.
What is the cochlea?
pg 569
The low-pulse sounds of this animal travel more than four times faster through water than they would through air.
What is a fin whale?
pg 567