COMD 5070 COMPREHENSIVE EXAM
STUDY GUIDE WITH COMPLETE
SOLUTIONS
●● The period of a sine wave
Answer: is shorter for higher frequency sounds
●● Pressure can de defined as
Answer: force divided by area
●● Intensity can be defined as
Answer: power per unit area
●● The inverse square law means that
Answer: intensity decreases by a factor equal to the square of the change
in distance
●● Based on the equal loudness curves figure (2-18, p33), a 100 Hz tone
would need to be approximately how many dB in intensity to sound
equally loud to a 1000 Hz tone at 40 dB?
Answer: 53 dB
, ●● We can typically perceive smaller differences in the pitch of two
sounds if they are
Answer: two lower frequencies
●● The human voice as a complex tone is best described as
Answer: nearly periodic
●● A power spectrum is a type of
Answer: frequency domain plot
●● Resonance occurs when
Answer: the applied force is at a frequency that matches the natural
frequency of an object
●● which of the following is an analog signal?
Answer: speech sounds in air
musical tones in air
displacement of the middle ear bones
all of the above
●● an analog signal (e.g. from a microphone)
STUDY GUIDE WITH COMPLETE
SOLUTIONS
●● The period of a sine wave
Answer: is shorter for higher frequency sounds
●● Pressure can de defined as
Answer: force divided by area
●● Intensity can be defined as
Answer: power per unit area
●● The inverse square law means that
Answer: intensity decreases by a factor equal to the square of the change
in distance
●● Based on the equal loudness curves figure (2-18, p33), a 100 Hz tone
would need to be approximately how many dB in intensity to sound
equally loud to a 1000 Hz tone at 40 dB?
Answer: 53 dB
, ●● We can typically perceive smaller differences in the pitch of two
sounds if they are
Answer: two lower frequencies
●● The human voice as a complex tone is best described as
Answer: nearly periodic
●● A power spectrum is a type of
Answer: frequency domain plot
●● Resonance occurs when
Answer: the applied force is at a frequency that matches the natural
frequency of an object
●● which of the following is an analog signal?
Answer: speech sounds in air
musical tones in air
displacement of the middle ear bones
all of the above
●● an analog signal (e.g. from a microphone)
