High-Intensity Piezoelectric Microphone
Meggitt Sensing Systems, a Meggitt group division, has introduced the Endevco model 2510 piezoelectric sound pressure level microphone, designed to measure very high-intensity acoustic noise and very low pressure fluctuations over a wide temperature range, supporting extreme acoustic measurement applications such as rocket launch separation studies and high-temperature aircraft engine noise monitoring, among others.
Featuring a rugged design, a wide sound pressure measurement range of 100 to >180 dB SPL and temperature measurement capabilities from -55 to +260 C (-67 to +500 F), the hermetically sealed stainless steel housing of the Endevco model 2510 encloses a special thick pressure diaphragm that is expressly designed to prevent puncturing, particle impact damage, accidental mishandling or high pressure pulses. Special insulation placed between the transducer and mounting surface prevents electromagnetic interference (EMI or ground looping) that can degrade data quality and lead to measurement uncertainty. Units feature integral vibration compensation within the sensing element and insensitivity to altitude changes, making them ideal for in-flight or airborne applications. As a self-generating device, the Endevco model 2510 also requires no external power source for operation.
As a high-impedance piezoelectric microphone, the Endevco model 2510 is intended primarily to be used along with charge amplifiers, such as the model 2680 airborne amplifier. Although basic design is directed toward maximizing charge characteristics, the model 2510 also gives excellent results when operated into voltage amplifiers. Long cables may also be used between the transducer and charge converter without affecting charge sensitivity. Also recommended for use with the model 2510 are the Endevco® signal conditioner models 133, 2775A, and 2721B.
Source: Meggitt Sensing Systems