Meggitt Introduces Free-Field iTEDS Enabled Microphone and Preamplifier Set

By DE Editors

Meggitt Sensing Systems introduced the Endevco model EM46BE, a combined -inch free-field pressure microphone and iTEDS-enabled preamplifier set (per IEEE 1451.4), designed for general purpose and larger channel count precision acoustic measurements within a variety of applications, including vehicle pass-by noise testing; environmental noise analysis; wind tunnel arrays; high sound pressure levels measurements; and appliance and other consumer product noise evaluations.

The unit comes in a preassembled, pre-calibrated kit, consisting of the model EM40BE 1/4-inch prepolarized free-field microphone and the model EM26CB 1/4-inch  ISOTRON preamplifier with Microdot coaxial connector, both constructed of stainless steel for high durability. Units are assembled in a clean room environment to avoid contamination of the contacts and are calibrated together to form a reliable acoustic measurement system. These combined units are fully repairable.

With a frequency response from 10 Hz to 40 kHz ( ±1 dB) and a wide dynamic range of 40 dBA to 160 dB (re. 20Pa), the device is designed according to guidelines set forth by IEC 61094 Class 1. Incorporation of iTEDS technology allows for the microphone and preamplifier to be recognized by any smart-transducer compatible input module. When connected, the analyzer will derive data such as microphone type, serial number and sensitivity, which can be read by the application software for simplified test setups. Units are designed to operate from any industry standard 2-20 mA power supply.

Recommended accessories include the model EM42AA handheld pistonphone calibrator, which facilitates field checks of complete acoustic measurement systems, as well as in-house microphone calibrations; the model 4416B ISOTRON power supply (2-20 mA); and the model 133 three-channel signal conditioner.

For more information, visit Meggitt Sensing Systems.

Sources: Press materials received from the company and additional information gleaned from the company's website.