| GR 40BD | |
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| ¼" Pressure, 1.6mV/Pa, Prepolarized, Precision microphone | ||
| GRAS 40BD is ¼” microphone for high level and high frequency measurements. Low sensitivity = 1.6 mV/Pa, with a dynamic range from 45 to 174 dB. | ||
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| GR 40BE | |
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| ¼" Free-field, 4mV/Pa, Prepolarized, Precision microphone | ||
| GRAS 40BE is ¼” microphone for high level and high frequency measurements. Reaching a frequency range up to 100 kHz. | ||
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