flat frequency response
  • For a component, circuit, device, piece of equipment, or system whose output is an interval of frequencies, a response in which all frequencies have equal amplitude.
  • For a component, circuit, device, piece of equipment, or system whose output is an interval of frequencies, a response in which all frequencies are within a specified interval of amplitudes. For example, a high-fidelity amplifier may have a frequency response of 10 Hz to 60 kHz, +/- 0.5 decibels, and be considered to be flat.

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