Hum Bug Noise Eliminator

Price: $1700.00

ELIMINATE GROUND NOISE

Leave ground-loops behind.
Easy to use adaptive circuitry makes enables noise-free recording.

Eliminate Interference

Without Altering Desired Input Signal From Biological Activity

Eliminate Noise

From Power Lines & Supplies, Lights, Ground Loops, Electrical Pickup

Save Time

Hum Bug Eliminates Noise in the Signal Path Without Adjustments

Eliminate Noise and Preserve Electrophysiology Signals With Ease

The Hum Bug Line Noise Eliminator from Quest Scientific 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.

Why the Hum Bug Noise Eliminator?

  • The Hum Bug does not introduce frequency loss, a DC voltage shift, signal attenuation, or a phase error recorded signal.
  • The Hum Bug eliminates 50/60 Hz electrical interference and more complicated noise signals while leaving the physiological signal intact.
  • The Hum Bug adapts to evolving noise characteristics.
  • Although the Hum Bug uses a powerful signal processor, your signal is never digitized.
  • 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.
  • The Hum Bug is not a filter, and does not create phase delays, amplitude errors, DC shifts or waveform distortion.
  • No settings or adjustments are required.

Common Applications

Connect the Hum Bug Noise Eliminator when using:
  • microelectrodes,
  • skin electrodes (EKG, EMG, EEG),
  • high gain amplifiers,
  • magnetic sensors
  • audio equipment.

Licensing Agreement

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

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. 100 Hz, 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: 120 V and 240 V 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

Frequently Asked Questions

Can I get a replacement Instruction Manual for this instrument?

Additional Operator's Manuals can be downloaded here or from the Summary tab above.

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.

A-M Systems instruments are not approved for use with human subjects in either a clinical or research environment.
Catalog #:726300
Price: $1,700.00
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