# Shared Flashcard Set

## Details

Physics for Music
Exam 1
38
Physics
09/25/2011

Term
 Acceleration
Definition
 the rate of change of speed or velocity
Term
 Coordinates
Definition
 a set f numbers used to locate a point along a line or in a space
Term
 Force
Definition
 an influence that can deform an object or cause it to change its motion
Term
 Gravity
Definition
 the force exerted by the Earth on all objects on or near it
Term
 joule
Definition
 a unit of energy or work
Term
 Mass
Definition
 a measure of resistance to change in motion, equal to force divided by acceleration
Term
 Power
Definition
 the rate of doing work, equal to work or energy divided by time
Term
 Work
Definition
 the net force on an object times the distance through which the object moves
Term
 Amplitude
Definition
 maximum displacement from rest
Term
 damping
Definition
 loss of energy of a vibrator, usually through friction
Term
 envelope
Definition
 time variation of the amplitude of a vibration
Term
 Frequency
Definition
 the number of vibrations expressed in hertz
Term
 fundamental
Definition
 the lowest frequency
Term
 harmonics
Definition
 modes of vibration whose frequencies are whole-number multiplies of the frequency of the fundamental mode
Term
 hemholtz resonator
Definition
 a vibrator consisting of a volume of enclosed air with an open neck or port
Term
 longitudinal vibration
Definition
 vibration in which the principla motion is in the direction of the longest dimension
Term
 node
Definition
 a point or line where minimal motion takes place
Term
 simple harmonic motion
Definition
 smooth, regular vibrational motion at a single frequency such as that of a mass supported by a string
Term
 spectrum
Definition
 a recipe that gives the frequency and amplitude of each component of a complex sound
Term
 spring constant
Definition
 the strength of a spring restoring force divided by displacement (K)
Term
 transverse vibration
Definition
 vibration in which the principal motion is at right angles to the longest dimension
Term
 Anechoic
Definition
 echo free, an anechoic room is one whose walls ceiling and floor are covered with sound absorbing material usually in the shape of wedges
Term
 diffraction
Definition
 the spreading out of waves when they encounter a barrier or pass through a narrow opening
Term
 Doppler effect
Definition
 the shift in apparent frequency when the source or observer is in motion
Term
 impulsive wave
Definition
 a brief disturbance or pressure change that travels as a wave
Term
 interference
Definition
 the interaction of two or more identical waves which may support or cancel each other
Term
 longitudinal wave
Definition
 a wave in which the vibrations are in the direction of propagation of the wave
Term
 reflection
Definition
 an abrupt change in the direction of wave propagation at a change of medium
Term
 refraction
Definition
 a bending of waves when the speed of propagation changes either abruptly or gradually
Term
 standing wave
Definition
 a wavelike pattern that results from the interference of two or more waves and has regions of minimum and maximum amplitude called nodes and antinodes
Term
 superposition
Definition
 the motion at one point in a medium is the sum of the individual motions that would occur if each wave were present by itself without the others
Term
 young modulus
Definition
 an elastic modulus of a solid, the ration of force per unit area to the stretch it produces
Term
 acoustic impedance
Definition
 a measure of the difficulty of generating flow it is the ratio of the sound pressure to the volume velocity due to a sound wave
Term
 electromagnetic force
Definition
 the force that results from the interaction of an alternating electric current with a magnetic field
Term
 linewidth
Definition
 the width change of frequency of a resonance curve, usually measured at 71% the max height, a measure of the sharpness of a resonacne
Term
 overtone
Definition
 a component of a sound with a frequency greater than the fundamental frequency
Term
 partial
Definition
 a component of a sound, includes the fundamental plus the overtones
Term
 sympathetic vibration
Definition
 one vibrator causing another to vibrate at he same frequency
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