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Humbug Noise Eliminator

Catalog # Description Price Quantity
726300 Humbug Noise Eliminator, 110V, 60Hz
$1,700.00

Quantity:
726310 Humbug Noise Eliminator, 220V, 50Hz
$1,700.00

Quantity:



Summary

A-M Systems is proud to offer to our customers another high quality instrument designed to improve electrophysiological recordings at an affordable price: The HumBug Noise Eliminator from Quest Scientific. The 'HumBug' Line Noise Eliminator removes line frequency noise from electrophysiological signals without filtering or requiring ongoing user attention. That means more time getting results, and less time solving continuously evolving noise and ground loop problems.

The HumBug eliminates 50/60Hz electrical interference as well as more complicated noise signals without distorting the raw waveform recordings. The HumBug also does not introduce Frequency Loss, a DC Voltage Shift, Signal Attenuation, or a Phase error recorded signal.

Although the HumBug uses a powerful signal processor, your signal is never digitized. The HumBug continuously constructs a replica of evolving noise present on the input signal and subtracts this replica from the signal, leaving the physiological signal intact. It performs this function in the presence of biological activity even when noise characteristics evolve over time. The HumBug is not a filter, and 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.

The HumBug is effective at removing noise associated with inadequate grounding, ground loops, and electrical pick up. Common applications include noise elimination from signals using microelectrodes, skin electrodes (EKG, EMG, EEG), high gain amplifiers, magnetic sensors and audio equipment. Faraday cages decrease the magnitude of environmental noise sources but this protection is often incomplete and working within a cage can be cumbersome. Notch or comb filters are occasionally used to suppress 50/60 Hz noise and harmonics but these filters will distort the input waveform if frequency components of the signal overlap with the filtered frequencies.

** Note: Due to licensing agreements, we are not permitted to sell the Humbug Noise Eliminator to customers located in the UK.

Specifications

THEORY OF OPERATION: All functions occur in parallel as the signal passes in a direct analogue path between input and output. The HumBug effectively isolates noise from an input signal even when the noise characteristics are evolving and the frequency components of the noise and input signal overlap.

FREQUENCY RESPONSE: Biological signals pass through the Hum Bug unchanged for Frequency components in the range of DC to greater than 500 kHz.

COMPLEX NOISE: Electrical interference often generates a mixture of harmonics at multiples of 50/60 Hz (e.g. 100Hz, 150 Hz, 200 Hz). The Hum Bug eliminates all harmonics with Frequencies up to several kHz. Therefore, even the complex spikes generated by dimmers and fluorescent lamps are eliminated.

APPLICATIONS: The Hum Bug can eliminate 50/60 Hz noise from virtually any analog signal. It is equally effective at removing noise associated with inadequate grounding, ground loops, and electrical pick up. Common applications include noise elimination from signals recorded using microelectrodes, skin electrodes (EKG, EMG, EEG), high gain amplifiers, magnetic sensors and audio equipment.

Shielded steel instrument box with cast aluminum base
  • W-6.5” D-7.5”; H-1.3”; (32,2 x 18.1 x 3.1 cm)
  • Weight 6 lbs (2.75 Kg)
Input Voltages
  • Input protection: 50 volts peak to peak
  • Maximum input signal: 5 volts average peak to peak
  • Maximum noise amplitude: 1 volt peak to peak
  • Power Supply: 120V and 240V available
Frequency Response
  • Noise cancellation: 50/60 Hz and harmonics up to 4 kHz
Controls
  • BYPASS: halts noise cancellation
  • HOLD: suspends adaptation to evolving noise
  • CLEAR: clears the noise replica
Display
  • LED indicates changing noise levels
  • GREEN: decreasing amplitude of the noise replica
  • RED: increasing amplitude of the noise replica

FAQ

  • Can I get a replacement Instruction Manual for this instrument?
  • My HumBug Noise Eliminator is not working, but our university has an excellent electronics facility. Can we repair the unit ourselves?
  • Can I use this instrument outside of the United States?
  • What are the proper operating and storage conditions for my HumBug Noise Eliminator?

  • Can I get a replacement Instruction Manual for this instrument?

    Additional Operator's Manuals are available for download by clicking on the 'Downloads' section from the menu bar at the top of this section.

    My HumBug Noise Eliminator is not working, but our university has an excellent electronics facility. Can we repair the unit ourselves?

    It is recommended that A-M Systems perform the needed repairs as we are the most familiar with the units. Please contact us for information on how to get your unit repaired. Please note that any user-attempted repairs during the warranty period may invalidate the warranty, and might invoke additional charges to correct them if A-M Systems is required to make repairs at a later date.

    Please note that any user-attempted repairs during the warranty period may invalidate the warranty, and might invoke additional charges to correct them if A-M Systems is required to make repairs at a later date.

    Can I use this instrument outside of the United States?

    All of A-M Systems instruments can be modified to work outside of the United States. Typically, this modification is made at the factory (at no additional cost) prior to shipping to our customers. Just inform the customer service department where the instrument will be used, so our technicians can prepare the proper power supply modifications.

    What are the proper operating and storage conditions for my HumBug Noise Eliminator?

    The HumBug Noise Eliminator is designed to be used under laboratory conditions. Operate in a clean, dry environment only. Do not operate in a damp environment. Temperatures for storage and operation should be between 5 °C and 40 °C. Storage should be indoors in a cool dry place.

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