Impulse Excitation

• Signal: unit pulse with amplitude

• • Impulse response immediately available
  • For systems with long reverberation time such as rooms there is very low energy in the excitation signal:
  • High crest factor:

• Averaging is unavoidable:

• • Periodic Impulse Excitation (PIE) and averaging the output signal in frequency domain
  • doubling the number of pulses results in an increase of SNR of 3dB