All About Sound!: Question Preview (ID: 15302)


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What is not true of a mechanical wave?
a) Wave propagation through a material medium (solid, liquid, gas) b) Transfer of energy through the medium (result of particle collision) is present c) There are two types of mechanical waves d) Sound is the only type of mechanical wave
What is an example of a longitudinal wave?
a) Seismic wave b) Ocean wave c) Hand wave d) Sound wave
A string produces sound when:
a) Vibration of the string creates a sound particle, which emits a pitch b) Vibration of the string creates a fundamental frequency, which emits a pitch c) Disturbance of string produces energy which is emitted as sound d) Disturbance of string creates echoes heard as pitches
Which is not true of a resonant frequency?
a) Natural frequency determined by the physical properties of an object b) Vibrates in a manner such that a standing wave pattern is formed within the object c) Must be the lowest possible frequency at which a string could vibrate to form a standing wave d) All true
What causes sound in wind instruments?
a) Standing waves that travel in the air pipes from nodes on closed ends to anti nodes on open ends b) Standing waves that travel in the air pipes from nodes on open ends to antinodes on closed ends c) Reflection of sound blown into the wind pipes and into air d) Refraction of sound blown into the wind pipes and into air
The principle of superposition states:
a) Wavelength is inversely propotional to frequency b) The combined waveform of interfering waves equals the sum of displacements of individual waves c) Sound travels in wave form d) Sound waves travel at incredibly high velocities
What allows us to distinguish the same note on different instruments?
a) Different sound particles b) Fundamental frequencies c) Timbre d) Slight pitch difference
What is not a factor in determining pitch from a string instrument?
a) Length of string b) Mode of vibration c) Thickness of string d) Plucking string v bowing on string
What is NEVER true of a wave?
a) Can be a regular rhythmic disturbance either of a medium and moving through that medium b) Can be some quantity with different values at different points in space and moving through space c) Wavelength is proportional to frequency d) Transfer of energy between particles (the result of particle collision)
What is unique of a fundamental frequency?
a) It is the lowest possible frequency at which a string could vibrate to form a standing wave pattern b) It is present in only longitudinal waves c) It is the lowest possible frequency at which a string could vibrate to form a longitudinal wave d) Is the only frequency that can be heard by the human ear
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