ECE Board Exam April 2001
What do you call the speed of sound in the study of
acoustics?
Tempo
ECE Board Exam November 2000
In the study of acoustics, the velocity of sound is
dependent to one of the following:
Properties of the
medium
ECE Board Exam Apri1 2000
How much bigger in storage capacity has digital video disk
(DVD) have over the conventional compact disk (CD)?
Around 15 times
ECE Board Exam November 1999
A sound intensity that could cause painful sensation In a
human ear
Threshold of pain
ECE Board Exam April 1999
Which of the following is the hearing range of the human
ear?
The range of the
human hearing is from 20 Hz to 20 kHz
ECE Board Exam April 1998
An instrument for recording waveforms of audio frequency.
Phonoscope
ECE Board Exam November 1997/April 2000
Designates the sensation of low or high in the sense of the
base and treble.
Pitch
ECE Board Exam April 1997
The sound energy per unit area at right angles to the
propagation direction per unit time.
Sound intensity
ECE Board Exam November 1996
Speaker is a device that ___________
converts current
variations into sound waves
ECE Board Exam March 1996
One-hundred twenty µbars of pressure variation is equal to
ECE Board Exam April 2000
The term that describes the highness or lowness of a sound
in the study of acoustics is called a
Pitch
ECE Board Exam November 1999
The method of measuring absorption coefficient of sound
which considers all angles of incidence is called
reverberation chamber
method
ECE Board Exam March 1996
The midrange frequency range of sound is from
256 to 2048 Hz
ECE Board Exam November 1997
A large speaker having a large diameter (15 cm and above).
Woofer
ECE Board Exam April 1997
_______ is the transmission of sound from one to an adjacent
room thru common walls, floors or ceilings.
Flanking transmission
ECE Board Exam November 1996
___________ is the advantage rate of transmission of sound
energy in a given direction through a cross sectional area of 1 sq. m. at right
angle to the direction.
Sound intensity
ECE Board Exam November 1997
A method of expressing the amplitude of a complex
non-periodic signals such as speech.
Volume
ECE Board Exam April 1997
The sound power level of a jet plane flying at a height of 1
km is 160 dB (re 10^-12). What is the maximum sound pressure level on the
ground directly below the plane assuming that the aircraft radiates sound
equally in all directions?
ECE Board Exam November 1996
The unit of pitch.
Mel
ECE Board Exam November 1997/April 1997
The tendency of the sound energy to spread.
Diffraction
ECE Board Exam April 1999
Which of the following is considered the most commonly used
measurable components of sound?
Particle displacement
ECE Board Exam April 1997
Lowest frequency produced by a musical instrument.
Fundamental
ECE Board Exam November 1997
Sound intensity is given as
dP/dA
ECE Board Exam April 1997
Tendency of sound energy to spread
Diffraction
ECE Board Exam November 1997
The lowest frequency
produced by an instrument.
Fundamental
ECE Board Exam March 1996
A car horn outdoors produces a sound intensity level of 90
dB at 10 ft away. At distance, what is the sound power in watt?
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