REq-X - Response Equalisation

What is Response Equalisation?

Response Equalisation is a new technique that allows you to flatten the frequency response of a transducer (accelerometers and microphones) in real-time. Response Equalisation is done by filtering the time signal of a transducer by the inverse of the frequency response. Response Equalisation can be added to any transducer with a frequency response stored in the Transducer Database, and to all TEDS accelerometers.

Benefits

  • More accurate measurements
  • Wider frequency range
  • The same transducer covers more applications

One Microphone for All Fields

Response Equalisation extends the frequency range in which the transducer can be used – and improves the accuracy of the measurement. This also means that you can use the same microphone for different sound fields – free field, pressure-field, and random. What’s more, the microphone can be corrected for various microphone accessories (for example, windscreen) and a better accuracy obtained.

Upper Frequency Extended by up to 50%

Until now it has been recommended only to use an accelerometer up to a third of the resonance frequency. Now the upper frequency can be extended by up to 50%.

Phase Equalization

REq-X includes phase equalization, allowing the phase of DC accelerometers to be used all the way up to half the mounted resonance frequency.

When REq-X is chosen, amplitude equalization is always used. Phase is included when information is available.

Frequency response of DC accelerometer Type 4574.The left graph is the frequency response of Type 4574. The right graph is the response with equalization up to 1 kHz. The green curve is magnitude, the red curve is phase.

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