1/4-INCH FREE-FIELD MICROPHONE, PREPOLARIZED
Free-field microphone designed for high-level and high-frequency measurements over a frequency range of 4 Hz to 100 kHz.
TYPE 4954
Type 4954 is a 1/4-inch Prepolarized Free-field microphone and is specially designed for high-level and high-frequency measurements.
The use of a laser welded stainless steel diaphragm and a stainless steel protection grid, make this microphone capable of withstanding rough environments.
| Code | 標準 | Polarization | 低周波数 | 高周波数 | Lower dynamic range | Higher dynamic range | 最大温度 | 最大温度 |
|---|---|---|---|---|---|---|---|---|
| -4954-A-011- | IEC 61094, IEC 61094 | Classical, Classical | 3 Hz | 80 kHz | 34 dB | 164 dB | 80 °C | 176 °F |
| -4954-A-023- | IEC 61094, IEC 61094 | Classical, Classical | 3 Hz | 80 kHz | 34 dB | 164 dB | 80 °C | 176 °F |
| -4954-A-- | IEC 61094, IEC 61094 | CCLD, CCLD | 16 Hz | 80 kHz | 40 dB | 159 dB | 80 °C | 176 °F |
| -4954-B-- | IEC 61094, IEC 61094 | CCLD, CCLD | 16 Hz | 80 kHz | 40 dB | 159 dB | 80 °C | 176 °F |
| -4954-W-004- | IEC 61672, IEC 61672 | Classical, Classical | 50 Hz | 22 kHz | 40 dB | 159 dB | 100 °C | 212 °F |
| 1/4-inch Prepolarized Free-field TEDS Microphone Types 4954-A and 4954-B | Data Sheets | English |
| Standard | IEC 61094, IEC 61672 |
| Sound field | Free field |
| Polarization | CCLD, Classical |
| Sensitivity | 2.8 mV/Pa |
| Lower frequency | 16 Hz, 50 Hz, 3 Hz |
| Higher frequency | 80 kHz, 22 kHz |
| Lower dynamic range | 40 dB, 34 dB |
| Higher dynamic range | 159 dB, 164 dB |
| Diameter | 1/4 inch |
| Venting | Side |
| Minimum Temperature | -20 °C |
| Maximum Temperature | 80 °C, 100 °C |
| Minimum Temperature | -4 °F |
| Maximum Temperature | 176 °F, 212 °F |
| Output signal (connectivity) | Passive |
This microphone consists of Microphone Type 4954 laser welded to a ¼" microphone preamplifier. The unit is assembled in a clean-room environment and sealed together, after which it is assigned one single type number and one single serial number. This means that the combined unit has better precision and long-time stability, and is handled as one complete unit.
The transducers can be connected to any CCLD input and support IEEE P1451.4 V0.9 TEDS (Transducer Electronic Data Sheet). The unit also contains TEDS, which means that information about the serial number, type and sensitivity is stored within it.
