Speakers Questionnaire
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ScribdTranslationsSpeakers Questionnaire
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ScribdTranslations1.- A speaker is a transducer...
electro-acoustic-mechanical
mechanical-acoustic-electric
electromechanical-acoustic
mechanical-acoustic-electric
2.- Which part of the speaker connects to the output of the amplifier?
mobile coil
magnet
c) cone
d) structure
3.-The speaker manufacturers indicate the impedance of the speakers to
a value frequency:
500Hz
800Hz
c) 1000Hz
2000Hz
4.- The most common values of speaker impedance
electrodynamics are:
3Ω and 6Ω
b) 4Ω and 8Ω
c) 6Ω and 9Ω
10Ω and 12Ω
5.- An inoperative speaker for frequencies
a) lower than resonance
b) higher than those of resonance
6.- Through the frequency response curve of a speaker, we can
to know
a) The sound pressure provided for each of the audio frequencies that
must reproduce.
b) The sound power provided for each of the audio frequencies
what it must reproduce.
c) the sound intensity provided for each of the audio frequencies
what should reproduce
d) the impedance provided for each of the audio frequencies that
must reproduce
7.- In a frequency response curve of a speaker, what value is the
most accepted deviation in quality materials.
-3 dB
-6 dB
-9 dB
-12 dB
8.- The coverage angle of a speaker is that in which the level of
sound pressure level (SPL)
a) it reduces by 6 dB compared to what it provides on its axis
b) is reduced by 3 dB compared to what it provides along its axis
c) is reduced by 10 dB compared to the one it provides on its axis
it is reduced by 12 dB compared to what it provides on its axis
9.- The parameter that informs us how a speaker concentrates power
acoustic in the useful direction (within its coverage angle) is
denomination:
sensitivity
efficiency
c) distortion
d) directivity
10.- Which speakers are more directional?
a) the low frequencies
b) those of medium and high frequencies
11.- The parameter that indicates the relationship between the acoustic power that
it produces the speaker for every watt of electricity we provide.
denomination:
sensitivity
efficiency
distortion
directivity
12.- What parameter defines the sound pressure level that a speaker
produce 1 m of distance on its axis when we feed it with 1 W of
audio power?
sensitivity
efficiency
c) distortion
d) directivity
13.- At mid and high frequencies where the ear is more sensitive to the
distortion, typical values usually range between:
a) 0.5% to 2%, of distortion according to quality
b) 3% and 8% distortion according to quality
c) 5% and 10% distortion depending on the quality
d) 10% and 15% distortion depending on quality
14.- When diffraction occurs
a) When the diameter of the cone >> wavelength at a frequency
determined
b) When the cone diameter < wavelength at a given frequency
15.- Which speakers have larger dimensions?
a) speakers for bass tones
b) speakers for mid tones
c) speakers for high tones
16.- What speakers have a higher cutoff frequency located at
occasions above 20 KHz?
a) speakers for bass tones
b) speakers for midtones
c) speakers for treble tones
17.- What type of speakers are the most used for high fidelity?
piezoelectric
b) dynamic
c) electrostatic
from the horn
18.- What type of speakers have a high impedance that forces to
work with amplifiers designed especially for them?
a) piezoelectric
b) dynamic
c) electrostatic
d) from the horn
19.- To achieve a wider horizontal coverage angle, we will place
the speakers
a) in column
in a fan shape
20.- If we want to achieve a hearing level of 105 dB and have
a speaker with a sensitivity of 87 dB/W at 1 meter, what power should it have?
supply the amplifier?
56 W
63 W
c) 72 W
d) 81 W
21.- Calculate the sensitivity of a speaker if it is connected to a
amplifier that delivers 80W and the sound level meter indicates 110 dB at 1 meter from
Distance. → 91 dB
22.- Define:
efficiency of a speaker
directivity of a speaker
acoustic short circuit
baffle