NEUMANN U 87 Ai Microphone
- FEATURES |
NEUMANN U 87
Ai Microphone - APPLICATIONS |
- Variable large diaphragm microphone
- Pressure-gradient transducer with double membrane capsule
- The studio microphone classic
- Three directional characteristics: omni, cardioid, figure-8
- Switchable low frequency roll-off
- Switchable 10 dB pre-attenuation
- Ideal as main and as support microphone in the most differing recording
situations
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- The Neumann U 87 Ai condenser microphone is a large diaphragm microphone
with three polar patterns and a unique frequency and transient response
characteristic.
- Users recognize the microphone immediately by its distinctive design.
It is a good choice for most general purpose applications in studios,
for broadcasting, film and television.
- The Neumann U 87 Ai is used as a main microphone for orchestra recordings,
as a spot mic for single instruments, and extensively as a vocal microphone
for all types of music and speech.
These are just some of the most common applications. We recommend additional
experimentation to gain maximum use from this microphone.
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NEUMANN U 87 Ai Microphone
- POLAR PATTERNS: |
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The dual-diaphragm capsule is elastically mounted
and protected by a large headgrille. A switch below the headgrille selects
the three directional patterns: omnidirectional, cardioid and figure-8.
A window above this switch shows the symbol of the selected characteristic.
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NEUMANN U 87
Ai Microphone - ACOUSTIC FEATURES
The Neumann U 87 Ai is addressed from the front, marked with the Neumann
logo. The frequency response of the cardioid and figure-8 directional
characteristics are very flat for frontal sound incidence, even in the
upper frequency range. The microphone can be used very close to a sound
source without the sound becoming unnaturally harsh. By means of a high-pass
filter interferences through subsonic and low frequencies are reduced
remarkably. |
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NEUMANN
U 87 Ai Microphone - FILTER AND ATTENUATION:
A switch located at the rear attenuates the sensitivity by 10 dB. When
this switch is activated, the microphone accepts sound pressure levels
up to 127 dB (equivalent to a sound pressure of 45 Pa) without distortion.
An additional switch at the rear allows to change the microphone's cutoff
frequency. This reduces low frequency interference directly at the input
of the microphone amplifier. This setting also compensates for the unavoidable
bass boost that occurs with all pressure gradient transducers when they
are used at close distance (proximity effect). The cardioid characteristic
maintains a smooth frequency response at a distance of 30 to 40 cm, the
figure-8 characteristic even at a distance of 15 to 20 cm. |
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NEUMANN U 87
Ai Microphone - ELECTRICAL FEATURES:
The letter A in the name indicates a more recent generation, as compared
to the Neumann U 87 i microphones that were built from 1967 to 1986. Modifications
apply to the electronic components of the microphone only; the capsule
remained unchanged. The present-day circuitry increases the operational
headroom of the Neumann U 87 Ai by supplying the bias voltages for the
capsule through a reduced resistance. The result is a higher sensitivity
of 10 dB for identical sound pressure levels, and an improved S/N ratio
of 3 dB. |