Typical applications and use
- Automotive industry
- Wind-induced noise measurement on vehicles
- Outdoor measurements on testing grounds
- Wind-tunnel testing
Just 2.5 mm thick, the 40LS has an integrated CCP preamplifier and is delivered with a built-in TEDS chip, which enables it to be programmed as a complete unit.
The 40LS requires a constant-current power supply, such as the G.R.A.S. 12AL CCP Supply, or any other CCP compatible power supply.
Close manufacturing tolerances together with the advantages of the TEDS chip, provide the 40LS with a high degree of interchangeability; a major advantage which excludes accounting for individual characteristics.
The 40LS is both very stable and robust. It has an integrated 1.5 m co-axial cable with a microdot connector and is delivered with a supple detachable silicon-rubber fairing.
Because of its lightness, the microphone with fairing can readily be mounted on surfaces using double-sided adhesive tape.
All G.R.A.S. microphones are individually checked and calibrated before leaving the factory.
An individual calibration chart is supplied with each microphone.
|Frequency range (±1 dB)||Hz||10 to 20 k|
|Frequency range (±3 dB)||Hz||5 to 70 k|
|Dynamic range lower limit (microphone thermal noise)||dB(A)||< 46|
|Dynamic range upper limit with G.R.A.S. CCP preamplifier||dB||167|
|Set sensitivity @ 250 Hz (±2 dB)||mV/Pa||1.8|
|Power supply (Constant Current Power)||mA||2 to 20|
|Temperature range, operation||°C / °F||–55 to 100 / -67 to 212|
|Temperature range, storage||°C / °F||-40 to 85 / -40 to 185|
|TEDS UTID (IEEE 1451.4)||27 v. 1.0|
|Connector type||Microdot 10/32|
|CE/RoHS compliant/WEEE registered||Yes / Yes / Yes|
|Weight||g / oz||3 / 0.101|
Typical frequency response
|G.R.A.S. GR0933||Adhesive tape, pre-cut, single-sided|
|G.R.A.S. GR0934||Adhesive tape, pre-cut, double-sided|
|G.R.A.S. MI0031||Cleaning tissue|
|G.R.A.S. AE0046||Adapter, BNC male to Microdot female|
|G.R.A.S. GR1252||Silicon-rubber fairing|
|G.R.A.S. 12AQ||Power Module (2-ch.)|
|G.R.A.S. RA0202||Calibration Adapter (required)|
|G.R.A.S. 42AP||Intelligent Pistonphone with built-inprecision barometer (250 Hz or 251.2 Hz,114 dB ±0.05 dB) (recommended)
|G.R.A.S. 42AA||Pistonphone (250 Hz, 114 dB ±0.08 dB)|
|G.R.A.S. GR1297||Stainless-steel fairing