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BNC Connector, 3.15 Hz to 20 kHz, 17 dB(A) to 138 dB, 50 mV/Pa, 1/2" Free-Field Acoustic Sensor—The GRAS 46AE provides functionality for measuring medium sound pressure levels at medium frequencies. It has a wide frequency range reaching up to 20 kHz and a large dynamic range from less than 17 dB(A) to 138 dB. The GRAS 46AE includes a 1/2" constant current power (CCP) preamplifier. Additionally, the GRAS 46AE is compliant with transducer electronic data sheet (TEDS) measurement platforms.