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As a free-field microphone, Type 40AZ is designed essentially to measure the sound pressure as it would appear if the microphone were not present, the sound field pointing towards the microphone. At low frequencies, the disturbing effects of its presence in the sound field are minimal (large wavelengths compared to the size of the microphone). At higher frequencies (>1 kHz), the effects of diffractions generally cause microphones to measure sound pressure levels increasing with frequency. |
Related Products: Type 40AM |
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Download PDF Data Sheet: pd_40AZ_ver_18_03_09.PDF. |
Adobe Acrobat reader is required for viewing data sheets. |
| Sensitivity: |
50 mV/Pa |
| Dynamic range: |
15 - 146 dB re. 20µPa |
| Frequency range: |
0.5 Hz - 20 kHz |
| Polarisation voltage: |
0 V |
| Outside diameter (with protection grid): |
13.2 mm |
| Length: (with and |
16.2 mm |
| without protection grid): |
15.3 mm |