# The Ultimate Quiz On Microphone

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How often do you use a microphone? Have you ever tried to know more about its physical structure? Let's do it now with the below quiz. It contains almost every type of question-related to microphones, from a condenser used in it to its directional characteristics. A microphone is an instrument or a computer peripheral class that converts sound waves into electrical energy. It is also called a mic or mike. Let's learn about it in detail with this quiz.

• 1.

### A condenser microphone's operation is based on

• A.

Resistance

• B.

Capacitance

• C.

Inductance

• D.

Diffusion

• E.

Reactance

B. Capacitance
Explanation
A condenser microphone's operation is based on capacitance. A condenser microphone, also known as a capacitor microphone, consists of a diaphragm that acts as one plate of a capacitor and a backplate that acts as the other plate. When sound waves hit the diaphragm, it vibrates, causing the distance between the plates to change, which in turn changes the capacitance. This variation in capacitance is then converted into an electrical signal, allowing the microphone to capture and transmit sound.

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• 2.

### Which polar pattern would be considered undirectional (one direction)?

• A.

Omni

• B.

Hemispherical

• C.

Figure eight

• D.

Cardioid

• E.

Trapezoid

D. Cardioid
Explanation
The polar pattern that would be considered undirectional (one direction) is the cardioid pattern. This pattern is named after its heart-shaped pattern, and it is characterized by picking up sound primarily from the front while rejecting sound from the back and sides. This makes it ideal for capturing sound from a specific source or direction, such as a solo performer on stage or a presenter at a conference.

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• 3.

### When a mic is moved closer to the sound source, there is an apparent boost in the bass response, this is called the

• A.

Low pass reinforcement

• B.

Low end rumble

• C.

Proximity effect

• D.

Bass saturation

• E.

Probability effect

C. Proximity effect
Explanation
The proximity effect refers to the phenomenon where the bass frequencies are emphasized when a microphone is moved closer to the sound source. This occurs because the microphone picks up more of the low-frequency sound waves when it is in close proximity to the source. As a result, there is an apparent boost in the bass response, which is characteristic of the proximity effect.

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• 4.

### The directional characteristics of a microphone are shown on a

• A.

Frequency response graph

• B.

Dynamic range graph

• C.

Polar pattern graph

• D.

Box venting nomograph

• E.

Spectrum analyzer

C. Polar pattern graph
Explanation
A polar pattern graph is used to show the directional characteristics of a microphone. It displays how the microphone picks up sound from different directions, indicating its sensitivity and rejection angles. This graph helps in understanding the microphone's ability to capture sound from specific angles and reject sound from other directions. It provides valuable information for choosing the right microphone for specific recording situations and helps in achieving desired sound capture results.

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• 5.

### If it's rear/side ports are closed, a cardioid microphone becomes

• A.

Figure eight

• B.

Hyper cardioid

• C.

Omnidirectional

• D.

Super cardioid

• E.

Bi-directional

C. Omnidirectional
Explanation
When the rear/side ports of a cardioid microphone are closed, it becomes omnidirectional. A cardioid microphone is designed to mainly pick up sound from the front and reject sound from the rear and sides. However, when the rear/side ports are closed, it allows sound to enter from all directions, making it omnidirectional. This means that the microphone will pick up sound equally from all directions, resulting in a more versatile and all-encompassing recording or amplification of sound.

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• 6.

### Which microphone has a Hypercardioid polar response?

• A.

RE 20

• B.

MD 441

• C.

D 112

• D.

M 88

• E.

M 49

D. M 88
Explanation
The M 88 microphone has a Hypercardioid polar response.

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• 7.

### A frequency response curve of a microphone indicates

• A.

The range of frequencies the mic's diaphragm is capable of capturing

• B.

The deviation in level of all frequencies on the audio spectrum, input compared to output of the microphone

• C.

The level above and below a known reference for frequencies of the audio spectrum

• D.

The response of the human ear to frequencies created by the diaphragm of the microphone

• E.

The range and deviation in level of frequencies, input compared to output that the microphone is capable of producing

B. The deviation in level of all frequencies on the audio spectrum, input compared to output of the microphone
Explanation
The frequency response curve of a microphone indicates the deviation in level of all frequencies on the audio spectrum, input compared to output of the microphone. This means that the curve shows how the microphone responds to different frequencies, showing any variations in the output level compared to the input level. It provides information about the microphone's sensitivity and accuracy in capturing different frequencies.

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• 8.

### A Moving Coil Microphone has

• A.

Two plates, separated by a dielectric, with a potential difference between them. The moving plate vibrates according to changes in air pressure

• B.

A mylar diaphragm which is attached a coil of wire suspended within a magnetic field that vibrates in response to air pressure changes

• C.

A permanently charged capsule that doesn't need phantom power to operate except to charge the capsule

• D.

A piezo crystal that vibrates in response to air pressure changes; the changing pressure causes a current flow within the crystal

• E.

Carbon granules, enclosed in a capsule, and subjected to a DC voltage

B. A mylar diaphragm which is attached a coil of wire suspended within a magnetic field that vibrates in response to air pressure changes
Explanation
A Moving Coil Microphone works by having a mylar diaphragm attached to a coil of wire. This coil of wire is suspended within a magnetic field. When there are changes in air pressure, the mylar diaphragm vibrates, causing the coil of wire to also vibrate. This vibration within the magnetic field generates an electrical signal, which can then be converted into sound. Therefore, the correct answer is a mylar diaphragm which is attached to a coil of wire suspended within a magnetic field that vibrates in response to air pressure changes.

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• 9.

### Without phantom power, which microphones will not work

• A.

Ribbon

• B.

Moving coil

• C.

Piezoelectric

• D.

Condenser

• E.

Piezoelectric and condenser

E. Piezoelectric and condenser
Explanation
Piezoelectric and condenser microphones require phantom power to function properly. Phantom power is a method of supplying power to microphones through the audio cables, typically using +48 volts. This power is necessary for the operation of condenser microphones, which use an internal capacitor to convert sound waves into electrical signals. Piezoelectric microphones also require phantom power because they rely on the piezoelectric effect, where pressure on certain materials generates an electrical charge. Without phantom power, these microphones will not receive the necessary power to produce sound signals and will not work.

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• 10.

### An electret condenser microphone

• A.

Requires phantom power as a power supply to polarize the plates that make up part of the diaphragm

• B.

Can operate from the power supply within a self powered DI

• C.

Has a diaphragm which is permanently charged

• D.

Has a special connector to allow the user to connect the microphone directly to the mainspower supply

• E.

None of the above

C. Has a diaphragm which is permanently charged
Explanation
The correct answer is that an electret condenser microphone has a diaphragm which is permanently charged. This means that it does not require an external power supply or phantom power to polarize the plates of the diaphragm. The diaphragm of an electret condenser microphone is made of a material that is permanently polarized and retains its charge, allowing it to generate an electrical signal without the need for additional power.

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• 11.

### Standard phantom power is

• A.

120 volts

• B.

5 amps

• C.

48 volts DC

• D.

48 volts AC

• E.

117 volts AC

C. 48 volts DC
Explanation
Standard phantom power is typically provided at 48 volts DC. Phantom power is used to provide power to condenser microphones and other audio devices that require external power to operate. This 48 volts DC power is sent through the microphone cable to power the device, allowing it to function properly.

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• 12.

### You would most likely use a bass roll off filter on a microphone

• A.

To cut down on the plosives

• B.

To protect the preamp from high SPLs

• C.

To minimize transmission noise

• D.

To minimize transmission noise and to reduce proximity issues

• E.

To reduce proximity issues, to cut down on plosives and to minimize transmission noise

E. To reduce proximity issues, to cut down on plosives and to minimize transmission noise
Explanation
A bass roll-off filter on a microphone is used to reduce proximity issues, which occur when the microphone is too close to the sound source and causes excessive low-frequency buildup. It also helps to cut down on plosives, which are sudden bursts of air that can cause distortion in the microphone. Additionally, the filter helps minimize transmission noise, which can be caused by interference or electrical disturbances. Overall, using a bass roll-off filter on a microphone helps to improve the clarity and quality of the recorded or transmitted audio.

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• 13.

### If you want a brighter sound when recording an electric guitar cabinet, the first adjustment you should make is:

• A.

Move the mic towards the center of the speaker cone

• B.

Move the mic towards the edge of the speaker cone

• C.

Adjust the low frequency EQ on the desk

• D.

Move the mic more off axis of teh cabinet

• E.

Move the closer to the floor

A. Move the mic towards the center of the speaker cone
Explanation
Moving the mic towards the center of the speaker cone will result in a brighter sound when recording an electric guitar cabinet. This is because the center of the cone produces a more focused and direct sound, which tends to have more high-frequency content. By positioning the mic in this area, it captures more of the high frequencies, resulting in a brighter overall tone.

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• 14.

### The purpose of a direct box is to

• A.

Convert from a wet to dry signal

• B.

Allow the signal to bypass the mic preamp

• C.

Convert from high impedance to low impedance

• D.

Avoid low frequency loss

• E.

None of the above

C. Convert from high impedance to low impedance
Explanation
A direct box is a device used to convert a high impedance signal, such as the output of an electric guitar or a keyboard, into a low impedance signal that can be easily connected to a mixing console or audio interface. This conversion helps in preventing signal loss, noise, and interference, ensuring a clean and balanced audio signal. By converting the high impedance signal to low impedance, the direct box allows for better compatibility and optimal signal transfer between different audio equipment.

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• 15.

### The specification that shows how much the rear of a directional mic rejects sound pressure is

• A.

Off axis rejection

• B.

Sensitivity

• C.

Transient response

• D.

Common mode rejection

• E.

Front to back discrimination

E. Front to back discrimination
Explanation
Front to back discrimination refers to the specification that shows how well a directional microphone can reject sound from the rear while capturing sound from the front. It measures the microphone's ability to minimize sound pickup from behind, ensuring that the desired sound source in front is captured with greater clarity and minimal interference from surrounding noise. This specification is particularly important in scenarios where the microphone needs to focus on a specific sound source while minimizing background noise.

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• 16.

### Which type of mic is generally used for live concert performances?

• A.

Ribbon

• B.

Condenser

• C.

Piezo

• D.

Electret

• E.

Moving coil

E. Moving coil
Explanation
Moving coil microphones are generally used for live concert performances because they are durable, can handle high sound pressure levels, and have a good off-axis rejection. They are also less sensitive to moisture and humidity, making them suitable for outdoor performances. Additionally, moving coil microphones have a warm and natural sound, which is desirable for capturing live music performances.

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• 17.

### A dual diaphragm condenser microphone is able to produce selectable polar responses by

• A.

Incorporating various adjustable acoustic ports around the diaphragm

• B.

Physically rotating the diaphragms in and out of phase

• C.

Changing the polarity and voltage relationships between the two diaphragms

• D.

Interchangeable capsules each with different polar response

• E.

Believing in the power of hope

C. Changing the polarity and voltage relationships between the two diaphragms
Explanation
A dual diaphragm condenser microphone is able to produce selectable polar responses by changing the polarity and voltage relationships between the two diaphragms. This means that the microphone can adjust the electrical signals produced by each diaphragm, allowing for different polar patterns to be achieved. By altering the relationship between the diaphragms, the microphone can capture sound from different directions, such as omnidirectional, cardioid, or figure-eight patterns. This flexibility in polar response makes the microphone versatile and suitable for various recording situations.

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• 18.

### Which type of microphone has good side rejection and even frequency response

• A.

Cardioid

• B.

Omni directional

• C.

Figure 8

• D.

Hypercardioid

• E.

None of the above

C. Figure 8
Explanation
A figure 8 microphone, also known as a bidirectional microphone, has good side rejection and even frequency response. This type of microphone is designed to pick up sound from the front and back while rejecting sound from the sides. It is shaped like the number 8, with two distinct pickup patterns facing opposite directions. This allows the microphone to capture sound sources directly in front and behind it, while minimizing sound from the sides. The even frequency response ensures that the microphone reproduces sound accurately across the entire audible range.

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• 19.

### Omni Directional Microphones are

• A.

Equally sensitive to all sound sources, regardless of their relative direction

• B.

Equally sensitive to sounds originating directly in front or behind the microphone while displaying a considerable amount of off axis colouration

• C.

Equally sensitive to sounds originating from in front and behind the microphone while rejecting sounds either side

• D.

Sensitive to sound sources regardless of their relative direction, however is only able to pick one sound at a time, due to phase cancellation

A. Equally sensitive to all sound sources, regardless of their relative direction
Explanation
Omni Directional Microphones are equally sensitive to all sound sources, regardless of their relative direction. This means that the microphone will pick up sounds from all directions with equal sensitivity. It does not matter if the sound is coming from in front, behind, or to the sides of the microphone, it will capture it with the same level of sensitivity. This makes omni directional microphones useful in situations where capturing sound from all directions is important, such as recording ambient sound or in conference settings where multiple speakers are present.

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• 20.

### IF you want more room sound when recording a bass guitar cabinet, the first adjustment you could make is:

• A.

Move the mic towards the center of the cone

• B.

Move the mic towards the edge of the cone

• C.

Adjust the low frequency EQ on the desk

• D.

Move the mid farther away from the cabinet

• E.

D. Move the mid farther away from the cabinet
Explanation
Moving the mic farther away from the cabinet would create more room sound when recording a bass guitar. By increasing the distance between the mic and the cabinet, the mic captures more of the natural reverb and ambience of the room, resulting in a more spacious and open sound. This technique is commonly used to add depth and dimension to recordings, especially for instruments like bass guitar that benefit from a fuller sound.

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• 21.

### Which of the following mics would be the best choice for a hi-hat?

• A.

RE20

• B.

C480 B

• C.

D112

• D.

M88

• E.

RE20 or D112

B. C480 B
Explanation
The C480 B would be the best choice for a hi-hat because it is specifically designed for capturing high-frequency sounds with clarity and precision. This microphone is known for its excellent transient response and extended frequency range, making it ideal for capturing the subtle nuances and fast attack of hi-hat cymbals. Additionally, the C480 B is a versatile microphone that can handle high sound pressure levels, ensuring that it can accurately capture the dynamic range of the hi-hat without distortion.

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• 22.

### You are recording a live performance in a noisy environment. The noise from the surrounding environment is a problem and you want the microphone to focus more on the performance. Which pick up pattern would you choose?

• A.

Fig 8

• B.

Omni

• C.

Cardioid

• D.

Hyper Bi-Directional

• E.

Hemispherical

C. Cardioid
Explanation
In a noisy environment, the best pick-up pattern to choose is the cardioid pattern. The cardioid pattern is most sensitive to sound coming from the front of the microphone and rejects sound from the sides and rear. This allows the microphone to focus on capturing the performance while minimizing the pickup of surrounding noise.

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• 23.

### The Sennheiser MD421 is a

• A.

• B.

Moving coil, cardioid, front address mic

• C.

Moving coil, omnidirectional, front address mid

• D.

• E.

B. Moving coil, cardioid, front address mic
Explanation
The correct answer is "moving coil, cardioid, front address mic." This means that the Sennheiser MD421 is a microphone that uses a moving coil as its transducer, has a cardioid polar pattern (meaning it picks up sound mainly from the front and rejects sound from the sides and rear), and is designed to be addressed from the front.

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• 24.

### The AKG C480B has a pad at what level of change?

• A.

-10dB

• B.

-20dB & -3dB

• C.

-10dB & +3dB

• D.

-10dB & -20dB

• E.

-10dB & -3dB

C. -10dB & +3dB
Explanation
The AKG C480B microphone has a pad at -10dB and +3dB. This means that it can attenuate the input signal by 10dB or boost it by 3dB. The pad is useful in situations where the input signal is too strong and needs to be reduced to prevent distortion or clipping. On the other hand, the +3dB boost can be used to compensate for low-level signals or to add some extra gain when needed.

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• 25.

### Which sensitivity spec reveals the most sensitive mic

• A.

-38dB RE 1V @ 1Pa

• B.

-32dB RE 1V @ .1Pa.

• C.

-25dB RE 1V @ 120dB-SPL

• D.

-127 dB-SPL RE 1V @ .1Pa.

• E.

-26dB RE 1V @ 1Pa.

B. -32dB RE 1V @ .1Pa.
Explanation
The sensitivity spec that reveals the most sensitive mic is -32dB RE 1V @ .1Pa. Sensitivity refers to how effectively a microphone converts sound waves into electrical signals. A lower dB value indicates higher sensitivity, meaning that the microphone can pick up even faint sounds. In this case, -32dB is lower than the other options, indicating that it is the most sensitive microphone. The .1Pa value represents the sound pressure level required for the microphone to produce a 1V output, further emphasizing its sensitivity.

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• 26.

### The SE SE1A is what kind of mic?

• A.

A small diaphragm, side address, cardioid, moving coil mic

• B.

A large diaphragm, front address, omni-directional FET condensor mic

• C.

A small diaphragm, front address, cardioid, condenser mic

• D.

A large diaphragm, front address, transformerless, multi-pattern condenser mic

• E.

A large diaphragm, side address, cardioid, tube condenser mic

C. A small diaphragm, front address, cardioid, condenser mic
Explanation
The SE SE1A is a small diaphragm, front address, cardioid, condenser mic. This means that it has a small diaphragm, which allows for accurate and detailed sound reproduction. It is a front address mic, meaning that the sound is captured from the front of the microphone. It has a cardioid polar pattern, which means that it picks up sound primarily from the front and rejects sound from the sides and rear. Finally, it is a condenser mic, which means that it uses a capacitor to convert sound waves into electrical signals.

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• 27.

### Which of these lists includes only Condenser Microphones?

• A.

RE20, SM 57, TLM170, SM58

• B.

D112, SE 2200A, KM84, SM81, RE20

• C.

SM57, U87, C414, MKH 80, MD441

• D.

U87, U89, M88, KM184, ML 5202

• E.

C1000, SE 2200A, SM87, B1, TLM-170