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2660 -
1-inch microphone preamplifier, very low noise, 20 dB gain, for Type 4179
Condenser Microphone Type 4179 and Microphone Preamplifier Type 2660 constitute a unique system for measuring sound pressures well below the nominal 0dB re POpPa reference level for acoustic measurements. The 1/3-octave bandwidth inherent noise floor of the complete system at 1 kHz is typically -16dB.
Uses
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Hearing research
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Monitoring of very low background noise levels
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Sound power measurement of very-low-level sources
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Distanced measurement of very-low-level compressor, fan or motor noise where close measurements
Features
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Very low inherent noise floor of -2,5dB (A) . (-7 to -16dB in the ‘/s-octave bands 20 Hz to 20 kHz)
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High sensitivity: 1 V/Pa
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Frequency response in accordance with IEC 651, Type 1
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Microphone individually calibrated
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Well-defined operating characteristics
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