Microphones – Preamplifier High Pass and A-weighted Filtering

The GRAS Sound and Vibration Model 26 CF preamplifier provides switchable high pass and A-weighted filtering.

The integrated 20 Hz high pass filter helps eliminate inaudible low frequency signals from entering the data acquisition system and using up headroom.

An integrated A-weighted filter removes energy as defined in by the A-weighting curve, allowing you to make A-weighted sound level measurements without external or digital filters.

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