Exam 1, CSD 331 Exam 3, Exam 2
Questions and Complete Solutions
Graded A+
sound - Answer: vibration moving through space in a wave
What is sound as a physical event? - Answer: what is happening in the air and measurement. Its the
frequency, amplitude/intensity, and phase
What is sound as a psychological phenomenon? - Answer: it's our perception of sound in pitch,
loudness, and quality.
phase - Answer: measurement of cycle of sound and where the wave is in the cycle during a specific
point in time. (Ex. compressed? rareified?) Measured in the degrees of a circle.
What are the requirements for there to be sound? (3) - Answer: source of vibration, energy from that
vibration must cause a disturbance in a medium with mass and elasticity, and that disturbance must
move away from the sound source.
How does sound work? - Answer: It's like the domino effect. Molecules do the wave, like people do at a
football game.
compression - Answer: The part of a longitudinal wave where the particles of the medium are close
together. There is more pressure in that space
Rarefaction - Answer: a part in a longitudinal wave where the particles are spread apart. Less pressure is
in that space
how fast is sound? - Answer: 343 meters/second, BUT it depends on the density of the medium
,Transverse waves - Answer: A wave in which the particles of the medium move perpendicularly to the
direction the wave is traveling
longitudinal wave - Answer: A wave in which the vibration of the medium is moving in the same
direction as the direction of the wave (SOUND)
sine - Answer: a sound with only one frequency
complex sound - Answer: a sound composed of at least two, but usually many more, frequency
components (most sounds in our natural environment)
waveform - Answer: graphic representation of changes in the air pressure during sound.
on a waveform, the compression line is? - Answer: high
on a waveform, the rarefaction line is? - Answer: low
cycle - Answer: a wave starts at a resting point, goes through a compression, rarefaction, and repeats.
Starts and ends at the same point on a wave
Sine waves: Frequency - Answer: changes in the rate of air molecule mvmnt
number of cycles per second
measured in Hertz (1cycle/sec)
period - Answer: amount of time needed for one cycle
seconds/cycle
high frequency/shorter period and vice versa
There is a ______ relationship between period and frequency - Answer: reciprocal (period =
1/frequency)
, the period of a wave that measures 4 hertz is what? - Answer: 1/4 of a second
what is the range humans can hear? - Answer: 20-20,000 Hz
amplitude - Answer: Distance from rest to crest or rest to trough; how far a wave moves from it's resting
point
intensity - Answer: magnitude/strength of a sound, measured in micropascals. 20-200million is the
audible range for humans. How much sound power is transferred from the source to surroundings
otolaryngologist - Answer: ENT doctor
Neurotologist - Answer: E.N.T. plus additional training w/ focus on ear disorders
audiologist - Answer: specialist in hearing loss/disorders, balance, is a DR, but not medically
Hearing Aid Dispenser - Answer: sells and fits hearing aids, high school diploma and pass a licensing test
Where can audiologists work? - Answer: medical, private practice, pediatric, educational, rehabilitative,
industrial, forensic, military
What do audiologists do? - Answer: identify, assess, manage, and prevent disorders of hearing and
balance through tests
Vestibular testing - Answer: how ear responds to mvmnt and how that affects dizziness
auditory processing - Answer: what we do with what we hear
Electrophysiology - Answer: testing hearing with brainwaves
Questions and Complete Solutions
Graded A+
sound - Answer: vibration moving through space in a wave
What is sound as a physical event? - Answer: what is happening in the air and measurement. Its the
frequency, amplitude/intensity, and phase
What is sound as a psychological phenomenon? - Answer: it's our perception of sound in pitch,
loudness, and quality.
phase - Answer: measurement of cycle of sound and where the wave is in the cycle during a specific
point in time. (Ex. compressed? rareified?) Measured in the degrees of a circle.
What are the requirements for there to be sound? (3) - Answer: source of vibration, energy from that
vibration must cause a disturbance in a medium with mass and elasticity, and that disturbance must
move away from the sound source.
How does sound work? - Answer: It's like the domino effect. Molecules do the wave, like people do at a
football game.
compression - Answer: The part of a longitudinal wave where the particles of the medium are close
together. There is more pressure in that space
Rarefaction - Answer: a part in a longitudinal wave where the particles are spread apart. Less pressure is
in that space
how fast is sound? - Answer: 343 meters/second, BUT it depends on the density of the medium
,Transverse waves - Answer: A wave in which the particles of the medium move perpendicularly to the
direction the wave is traveling
longitudinal wave - Answer: A wave in which the vibration of the medium is moving in the same
direction as the direction of the wave (SOUND)
sine - Answer: a sound with only one frequency
complex sound - Answer: a sound composed of at least two, but usually many more, frequency
components (most sounds in our natural environment)
waveform - Answer: graphic representation of changes in the air pressure during sound.
on a waveform, the compression line is? - Answer: high
on a waveform, the rarefaction line is? - Answer: low
cycle - Answer: a wave starts at a resting point, goes through a compression, rarefaction, and repeats.
Starts and ends at the same point on a wave
Sine waves: Frequency - Answer: changes in the rate of air molecule mvmnt
number of cycles per second
measured in Hertz (1cycle/sec)
period - Answer: amount of time needed for one cycle
seconds/cycle
high frequency/shorter period and vice versa
There is a ______ relationship between period and frequency - Answer: reciprocal (period =
1/frequency)
, the period of a wave that measures 4 hertz is what? - Answer: 1/4 of a second
what is the range humans can hear? - Answer: 20-20,000 Hz
amplitude - Answer: Distance from rest to crest or rest to trough; how far a wave moves from it's resting
point
intensity - Answer: magnitude/strength of a sound, measured in micropascals. 20-200million is the
audible range for humans. How much sound power is transferred from the source to surroundings
otolaryngologist - Answer: ENT doctor
Neurotologist - Answer: E.N.T. plus additional training w/ focus on ear disorders
audiologist - Answer: specialist in hearing loss/disorders, balance, is a DR, but not medically
Hearing Aid Dispenser - Answer: sells and fits hearing aids, high school diploma and pass a licensing test
Where can audiologists work? - Answer: medical, private practice, pediatric, educational, rehabilitative,
industrial, forensic, military
What do audiologists do? - Answer: identify, assess, manage, and prevent disorders of hearing and
balance through tests
Vestibular testing - Answer: how ear responds to mvmnt and how that affects dizziness
auditory processing - Answer: what we do with what we hear
Electrophysiology - Answer: testing hearing with brainwaves
