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Noise Eliminator; Eliminate 50/60 Hz noise and harmonics without filtering

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A New Solution

WPI is proud to distribute the Hum Bug -- a new approach to Noise Control. This is a powerful new technology for cancelling electrical interference in real-time, avoiding all of the traditional problems associated with notch filters. The Hum Bug constructs a replica of noise present on the input signal and continuously subtracts this replica from the signal as it passes through the instrument. It performs this function in the presence of biological activity even when noise characteristics evolve over time.


The Hum Bug is not a filter. It does not create phase delays, amplitude errors, DC shifts or waveform distortion. Simply connect it between your preamplifier and any analysis equipment and it will automatically eliminate 50/60 Hz noise and harmonics with frequencies up to several kHz. Noise is eliminated without altering the signal of interest even when frequencies within the signal overlap with noise components. No settings or adjustments are required.

Figure 1. A hippocampal recording contaminated with line noise. The physiological signal remains intact as the HumBug removes the imbedded line noise.

Eliminates Electrical Interference

  • Simple 50/60 Hz Sine Waves
  • Mixtures of 50/60 Hz Harmonics
  • Noise Spikes from Dimmers
  • Complex Noise from Fluorescent Lamps

No Waveform Distortion

  • No Frequency Loss
  • No DC Voltage Shift
  • No Signal Attenuation
  • No Phase Error

Note: This product is only available to users outside of the UK. If you are in the UK, please click here.




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