Worksheetssound System Quiz 3
Total questions: 31
Worksheet time: 17mins
A measure of how high or low a sound is perceived to be, depending on the frequency of the sound wave
Pitch
Frequency
Amplitude
Decibel
The most common unit used to measure loudness (symbol: dB)
Hertz
Decibel
Centimeters
Yards
the combination of two or more waves that results in a single wave
Resonance
Refraction
Interference
Echo
sound waves with frequencies greater than 20,000 hertz (Hz), the upper limit of typical hearing levels in humans, often used in medical purposes
Frequency
Infrared rays
Ultrasound
Radio Waves
a reflected sound wave
Mirror
Image
Echo
Opaque
Which of these waves represents the loudest sound?
Which one the following illustrates the correct PA system hook up?
Which one of the following knobs on the compressor would you adjust for the signal to begin attenuating?
Which one of the following could be used as part of system protection?
Multi-Effects.
Hard Knee Gate
Brick Wall Limiter.
Hard Knee Compressor.
Reverb is a type of
phase effect.
flanging effect.
time based effect.
modulation effect
The difference in decibel levels between the strongest and the weakest audio output signals that a hi-fi system can produce while maintaining clarity is known as the
alpha cut off.
dynamic range.
distortion coefficient
gain bandwidth product
What is the testing equipment in Figure 24?
Fig 24
Cable tester
Noise meter.
Voltage tester.
Spectrum tester.
Fig 31.
Which one of the following can be used to control the dynamic range of the trumpet?
Gate.
Compressor.
Brick Wall Limiter
Fader Level On Mixing Console.
Which one of the following low SPL source can be miked up using a condenser?
As
As a sound engineer, which one of the following must you do to prevent feedback?
Keep the onstage volume down.
Ensure that a notch filter is not used.
Ensure that microphones are pointed towards the speakers.
Increase the frequency levels where the feedback is occurring.
Identify a 3.5mm TRS connector from Fig 10.
Extreme deflection on a truss can cause instability to a completed structure. The maximum deflection limit allow is
1/50 of the span.
1/100 of the span.
1/1000 of the span.
1/5000 of the span.
The impedance of a speaker is basically a measurement of how hard the amplifier will have to work to drive that speaker. Impedance is measured in___________.
volt
ohm
hertz
ampere
When setting up hand held vocal microphones, it’s necessary to follow the recommended steps. Identify the non-recommend practice.
Microphones placement, tapping microphone heads
Microphones placement, 3-4 inches away from
the mouth.
Microphones placement, isolate singers from
unwanted sound.
Microphones placement, pointed between the nose and mouth.
A simple PA (public address) system shown in Fig. 21 consists of a microphone, an amplifier and speaker. Placing a microphone in front of a speaker will produce
Fig.21
hum.
feedback.
no sound
Noise
A
low voltage mobile generator set will produce an output of
three – phase, 230V between phase and Earth.
single– phase, 230V between phase and Earth.
single – phase, 118V between phase and Earth
single – phase, 118V between phase and Earth
The combined resistance of two 8 ohms speakers connected in parallel is__
4 ohms
16 ohms.
8 ohms.
32 ohms.
Which one of the following arrangements will have the lowest current?
10 volts output connects to 2 ohms speakers.
10 volts output connects to 4 ohms speakers.
10 volts output connects to 8 ohms speakers.
10 volts output connects to 16 ohms speakers.
Earth loop hum is a major problem for professional sound systems, and is often created when
connectors are dirty.
there is no earth connection
the cable is not securely mounted
two or more pieces of electronic equipment are inter-connected.
