Part 3.5 Flashcards
Sound pressure is measured in dynes/cm2.
True
False
True
Essentially, a capacitor passes high frequencies and blocks low frequencies.
True
False
True
At what Sound Pressure Level, for normal ears, does sound become painful?
a) 110 dB SPL
b) 140 dB SPL
c) 1000 dynes/cm sq.
d) 10-16 watts/sq. cm.
b) 140 dB SPL
What does the term 67 dB mean?
a) half of the total range of intensities (0-134)
b) 67 dB of acoustic power
c) sound pressure level of 67 dB
d) means nothing since no standard reference is given
e) 67 dB for a 1000Hz tone
d) means nothing since no standard reference is given
dB is a relative term. With nothing to relate it to, it means nothing
The harmonic just above 200 Hz would be
a) 300 Hz
b) 400 Hz
c) 500 Hz
d) 600 Hz
e) 800 Hz
b) 400 Hz
Harmonics double.
An average hearing loss is generally considered in reference to
a) bone conduction testing
b) PB word lists
c) air conduction testing
d) a combination of all three
c) air conduction testing
Air conduction testing is best for establishing loss, as opposed to understanding, or to specialized (sensorineural) loss.
The quality or timbre of a sound is a property that depends on
a) the harmonics
b) the overtones
c) the strength of frequencies in a complex sound
d) the strength of each frequency in a sound
e) all of the above
e) all of the above
A person complains of a plugged up feeling from his earmold. What can you do to help?
a) enlarge the sound bore
b) alternate aid between ears
c) recommend a bone conduction aid
d) use filters
e) vent the mold
e) vent the mold
If something is plugged, let some air in.
The amount of electricity flowing from a battery through the circuit is called the
a) milliamperes
b) milliwatts
c) resistance
d) current
d) current
The middle ear may be considered a transformer because it causes an increase in sound pressure
True
False
True
Excessive ambient noises produce problems for low frequency test signal more than high frequency signals
True
False
True
Even though integrated circuits use more power, their smaller size give them a great advantage over vacuum tubes
True
False
False
Integrated circuits don’t use more power.
The acoustic reflex threshold for normal hearing individuals generally occurs below the uncomfortable listening level
True
False
True
The pure tone average is useful information as part of the audiological evaluation process
True
False
True
Which of the following would be overtones if the fundamental frequency was 500 Hz?
a) 600 Hz
b) 1000 Hz
c) 1500 Hz
d) b and c
e) a, b and c
d) b and c
