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NEUMANN U 89 i Microphone
The Neumann U 89 i microphone is a studio microphone for universal
applications. The headgrille protects a dual-diaphragm capsule. A rotary
switch below the headgrille selects from five different polar patterns.
Therefore the microphone can be adapted easily to large sound sources,
and those that are spread wide apart, or to sound sources to be recorded
at a greater distance.
The amplifier accepts sound pressure levels up to 134 dB without distortion.
This figure can be increased to 140 dB. An additional rotary switch activates
a filter that changes the low frequency response either below 80 Hz or
160 Hz frequency.
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NEUMANN U 89 i Microphone
- FEATURES |
NEUMANN U 89
i Microphone - APPLICATIONS |
- Variable large diaphragm microphone
- Pressure-gradient transducer with double membrane capsule
- Five directional characteristics: omni, wide-angle cardioid, cardioid,
hyper-cardioid, figure-8
- Thereby most versatile in all recording situations
- Two-stage roll-off filter
- Switchable 10 dB pre-attenuation
- Extended frequency range in comparison to Neumann U 87 Ai
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- A microphone for universal usage.
- Use as a spot mic for wind instruments, strings, piano
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 89 i Microphone
- POLAR PATTERNS: |
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| In addition to the usual directional
polar patterns: omnidirectional, cardioid, and figure-8, we have added a
hypercardioid and wide-angle cardioid characteristic. When compared to the
standard cardioid pattern, the hypercardioid characteristic suppresses sound
from the side more efficiently. The wide-angle polar pattern is especially
useful to record large sound sources. |
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NEUMANN
U 89 i Microphone - ACOUSTIC FEATURES:
The microphone is addressed from the front, marked with the Neumann logo.
The large diaphragm capsule has a very smooth frequency response for all
polar patterns over a wide acceptance angle. The frequency response curves
are flat up to 10 kHz within a pickup angle of ± 100°.
As a result the Neumann U 89 i has a very even diffuse-field response
for all polar patterns. This is important in a reverberant environment
when more reflections arrive at the microphone capsule. The acoustic information
is not affected in its tonal quality when recorded by the microphone.
This characteristic is achieved without resorting to corrective resonance
effects. The capsule it is elastically mounted to avoid any structure
borne noise that could interfere with its operation.
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NEUMANN
U 89 i Microphone - FILTER AND ATTENUATION:
The amplifier handles sound pressure levels up to 134 dB without distortion.
With a self noise level of 17 dB (A-weighted) the total dynamic range
is 117 dB. Maximum sound pressure level is 140 dB when the - 6 dB rotary
switch is in the ON position. A low frequency roll-off at 80 Hz or 160
Hz can be activated with another rotary switch below the headgrille. This
filter suppresses low frequency interference, yet maintains an even frequency
response for close-up sound sources, for example, when proximity effect
could adversely affect the program material. A steep high-pass filter
in the LIN position prevents the output transformer of the microphone
from being overloaded due to undesired subsonic frequencies. |
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NEUMANN
U 89 i Microphone - OPERATIONAL SAFETY:
All exposed surfaces of the microphone capsule, including the diaphragms,
are at ground potential. This technology makes them highly immune to electrical
and atmospheric interference and contamination through microscopic dust
particles. |
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