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Model BETA 87A User Guide
BETA 87A
SUPERCARDIOID CONDENSER MICROPHONE
The Shure Model BETA 87A is a premium quality supercar- dioid
The BETA 87A features a controlled
Features:
•Smooth frequency response with gradual presence rise
•Highly consistent supercardioid polar pattern provides superior
•Electronic
•Wide dynamic range (117 dB) and low distortion character- istics
•Very low susceptibility to RFI and electromagnetic hum
•Advanced cartridge
•
•Reliability for years of
2005, Shure Incorporated 27D2965 (Rev. 7)
APPLICATION AND PLACEMENT
Some of the most common applications and placement techniques are listed in the following table. Keep in mind that microphone technique is largely a matter of personal taste— there is no one “correct” microphone position.
SUGGESTED MICROPHONE | TONE QUALITY |
PLACEMENT |
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|
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Lips less than 6 inches (15 cm) away | Robust sound, emphasized |
or touching the windscreen, on axis to | bass, maximum isolation from |
microphone. | other sources. |
|
|
6 inches to 2 feet (15 to 60 cm) away | Natural sound, reduced bass. |
from mouth, just above nose height. |
|
|
|
8 inches to 2 feet (20 to 60 cm) away | Natural sound, reduced bass |
from mouth, slightly off to one side. | and minimal ”s” sounds. |
|
|
3 to 6 feet (90 cm to 1.8 m) away. | Thinner, distant sound; notice- |
| able levels of ambient noise. |
|
|
General Rules for Microphone Use
1.Aim the microphone toward the desired sound source and at a 125° angle away from unwanted sources. Don’t place un- wanted sound sources directly to the rear of the microphone since supercardioid microphones, such as the BETA 87A, have a narrow pick up range at about 180°. Refer to Figure 1.
2.Place the microphone as close as practical to the desired sound source. Refer to the table above.
3.Use only one microphone for each sound source.
4.Keep the distance between microphones at least three times the distance from each source to its microphone.
5.Place microphones as far as possible from reflective sur- faces.
6.Work close to the microphone for extra bass response.
7.Use the fewest number of microphones as is practical.
8.Add a windscreen when using the microphone outdoors.
9.Avoid excessive handling to minimize pick up of mechanical noise and vibration.
10. Do not cover any part of the grille with your hand.
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| 180o |
180o |
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| 90o |
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125o | 125o |
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| |
90o | 90o | 180o | 0o | 90o | 90o |
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| |||
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| 125o |
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0o |
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| 90o |
| 0o |
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| ||
CORRECT |
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| CORRECT |
| INCORRECT |
POSITIONING UNWANTED SOUND SOURCES
FIGURE 1
Printed in U.S.A.