OBERFLÄCHENMIKROFON FÜR AUTOMOBILANWENDUNGEN
Oberflächenmikrofon für Kraftfahrzeuge, das für die Messung des wahren Oberflächendrucks entwickelt wurde. Ideal für die direkte Montage auf der Fahrzeugoberfläche bei Windkanaltests und für Messungen in engen Räumen.
TYPE 4949
Typ 4949 ist ein „Fahrzeugmikrofon“, das für die Messung des wahren Oberflächendrucks in Automobilanwendungen entwickelt wurde. Das Mikrofon eignet sich hervorragend für die direkte Montage auf der Fahrzeugoberfläche bei Windkanaltests oder für Messungen in engen Räumen, z. B. an der Firewall oder der Unterseite eines Fahrzeugs.
| Code | Name |
|---|---|
| -4949--- | Oberflächen-Mikrofon, 11,2 mV/Pa, 1,2 m |
| -4949-B-- | Oberflächen-Mikrofon, 11,2 mV/Pa, zwei 1 |
| -4949-W-003- | Microphone, Automotive Surface, with Rei |
| -4949-W-004- | Oberflächen-Mikrofon, in Gummischeibe mo |
| -4949-W-007- | Microphone, Automotive Surface, with 0,5 |
| Sound field | Pressure field |
| Polarization | CCLD |
| Sensitivity | 11.2 mV/Pa |
| Lower frequency | 5 Hz |
| Higher frequency | 20000 Hz |
| Lower dynamic range | 30 dB |
| Higher dynamic range | 140 dB |
| Diameter | 1/2 inch |
| Venting | Front |
| Minimum Temperature | -30 °C |
| Maximum Temperature | 100 °C |
| Minimum Temperature | -22 °F |
| Maximum Temperature | 212 °F |
| Output signal (connectivity) | Passive |
Type 4949 is a "car microphone" designed for measuring the true surface pressure in automotive applications. The microphone is exceptionally suited for mounting directly on the car surface during wind-tunnel tests or for measurement in confined spaces; for example, on the firewall or the underside of a vehicle.
The optional mounting pads allow easy mounting of the microphone even on the curved surfaces of a car. Despite its small size, Type 4949 is a rugged and stable measurement microphone. The microphone housing and the metallic parts of the diaphragm-backplate arrangement, including the diaphragm, are all titanium, ensuring uniquely high resistance to corrosion.
The diaphragm is flush with the microphone housing in order to minimize the wind-generated noise of the microphone. The microphone pressure-equalization vent is placed just next to the diaphragm on the front of the microphone. This is important since the static pressure can vary rapidly with position when the microphone is exposed to turbulent pressure fluctuations.
Surface Microphone Type 4949 has a built-in preamplifier for connection to CCLD inputs. The sensitivity of the microphone is optimized in order to achieve a good noise floor and still allow measurements at higher levels without clipping.
The microphone supports IEEE 1451.4 (TEDS) for remote identification of the transducer and reading of its calibrated sensitivity. Type 4949 B also supports Brüel & Kjær’s proprietary Charge Injection Calibration (CIC) for remote verification of the complete, calibrated measurement channel.
Surface Microphone Type 4949 is yet another product based on Brüel & Kjær’s new patent-pending microphone technology.
With this technology, it is possible to obtain the same high
stability and uniformity as that of the traditional and well-known Brüel & Kjær measurement microphones
This will bring together HBM, Brüel & Kjær, nCode, ReliaSoft, and Discom brands, helping you innovate faster for a cleaner, healthier, and more productive world.
This will bring together HBM, Brüel & Kjær, nCode, ReliaSoft, and Discom brands, helping you innovate faster for a cleaner, healthier, and more productive world.
This will bring together HBM, Brüel & Kjær, nCode, ReliaSoft, and Discom brands, helping you innovate faster for a cleaner, healthier, and more productive world.
This will bring together HBM, Brüel & Kjær, nCode, ReliaSoft, and Discom brands, helping you innovate faster for a cleaner, healthier, and more productive world.
This will bring together HBM, Brüel & Kjær, nCode, ReliaSoft, and Discom brands, helping you innovate faster for a cleaner, healthier, and more productive world.
This will bring together HBM, Brüel & Kjær, nCode, ReliaSoft, MicroStrain and Discom brands, helping you innovate faster for a cleaner, healthier, and more productive world.