physics chapter 11- sound waves

open tube

2( l + .8(diameter)

audio spectrum

20Hz-20,000Hz

chord

3 or more sounds played at the same time

closed tube

4( l + .4(diameter)

vibrating matter

Sound is produced by ...............

longitudinal

Sound waves are __________ waves.

noise

a disagreeable sound wish is a random mix of frequencies

music

a pleasing sound which is a regular mix of frequencies

octave

anything with a frequency in the range of 1-2

difference tone

beat frequencies that are too large to be distinguished by the listener

logarithmic scale

because the human ear is sensitive to such a large range of frequencies, it is a ___________ ____________

Doppler effect

change in pitch produced by relative motion of the source and the observer

pitch

characteristic of sound that places the sound on the musical scale

law of strings

conditions affecting the frequency of vibrating strings

loudness

depends of the auditory sensation in the consciousness of the human listener

resonance

inducing vibrations of a natural rate by a vibrating source of the same frequency

sonometer

instrument used to study vibrating strings and the sounds they produce

radius squared

intensity is indirectly proportional to ____________

beats

outbursts of sound followed by an interval of comparative quiet

sonic spectrum

the frequency range over which longitudinal waves occur

harmonics

the fundamental vibrational modes having frequencies that are whole number multiples of the fundamental

threshold of hearing

the intensity of the average faintest audible sound

frequency

the measurable aspect of sound

sound

the range of compression wave frequencies to which the human ear is sensitive

intensity

the time rate at which sound energy flows through a unit area normal to the direction of propagation

forced vibrations

vibrations caused by the application of a periodic sound and not by the natural frequency of the object