Types 4160 and 4180 are both high stability condenser microphones for laboratory standard applications and in coupler measurements.
Uses
- Laboratory standard microphones
- Pressure and Free Field Reciprocity Calibrations
- Coupler measurements
Features
- Well defined integral front cavities for coupler calibrations
- Low hydrogen leakage from front cavity
- Well-defined operating characteristics
- Flat Frequency Pressure Responses up to: 4160: 8kHz/4180: 20 kHz
- Artificially aged for long term stability
- Low sensitivity to environmental changes
Type 4160 has been used for some time in such applications and conforms to IEC 327 and 402, ANSI S1.12-1967 and ANSI Sl.lO-1966, JIS C 5515, and the current IEC draft standard for 1” laboratory standardmicrophones. It has e established as a high precision reference standard and is used in the medium frequency ranges and for measurements at low sound pressure levels.
Type 4180 has been developed to meet a growing need for a laboratory standard ½" microphone which enables measurements at higher frequencies and at higher sound pressure levels.
Standard specifications for ½" laboratory standard microphones are under consideration and the 4180 has been designed to comply with the most recent drafts of these standards. Types 4160 and 4180 are delivered in mahogany boxes with inpidual calibration charts.
| Capacitance | 17.5 pF |
| Diameter | 1/2 inch |
| Dyn. Range | 18 - 160 dB |
| Freq. Range | 1 - 20000 Hz |
| Inherent Noise | 18 dB A |
| Lower Limiting Frequency -3dB | |
| Optimised | Calibration |
| Polarization | Ext. polarized |
| Polarisation Voltage | 200 V |
| Preamplifier Included | |
| Pressure Coefficient | -0.007 dB/kPa |
| Sensitivity | 12.5 mV/Pa |
| Standards | IEC 61094-1 LS2P |
| TEDS UTID | – |
| Temperature Coefficient | -0.002 dB/ºC |
| Temperature Range | -1 - 50 ºC |
| Venting | Rear |
| Input Type | Classic |
