Electronixwarehouse.com Adds Vital Information about Excess Noise to its Car Stereo Glossary

An update on changes and additions to the Electronixwarehouse Glossary of Technical Terminology
By: D. Harbaugh
 
April 25, 2012 - PRLog -- Electronixwarehouse, a leader in car audio consumer education, has heeded consumer requests for information about how to deal with excess noise interference in car stereo systems. Three new entries to its extensive Glossary of audio and stereo technical terms, help consumers understand the origin of unwanted noise, while a page in its Technical Advice and Assistance section explains how to reduce or eliminate noise. The new Glossary entries read as follows;

“NOISE
Perceived sounds not in the original soundtrack. Such things as hiss, crackle, pops, hum, and buzz, are typical of the types of extraneous signals described as noise. Inherent noise in the electronic processing in any system is measured in decibels relative to the amplitude of the original signal. Sounds perceived as noise are heard in contrast to the sound that is the object of attention. Thus, a noise signal measured at 15 decibels below the output of Tchaikovski's 1812 Overture finale would probably not even be heard; while a slight hiss at 55 dB below the level of a soft piano passage would be annoyingly obvious.

Generally, any piece of equipment which generates ambient noise of more than 90 dB below the level of a typical audio signal is noise free as far as most human perception is concerned. (also see Getting Rid Of Noise)

“NOISE FLOOR
Normally the lowest threshold of useful signal level (although sometimes audible signals below the noise floor may be recovered).

“NOISE GATE
An expander with a fixed "infinite" downward expansion ratio. Used extensively for controlling unwanted noise, such as preventing "open" microphones and "hot" instrument pick-ups from introducing extraneous sounds into the system. When the incoming audio signal drops below the user set-point (the threshold point) the expander prevents any further output by reducing the gain to "zero." The actual gain reduction is typically on the order of -80 dB, thus once audio falls below the threshold, effectively the output level becomes the residual noise of the gate. Common terminology refers to the gate "opening" and "closing." Another popular application uses noise gates to enhance musical instrument sounds, especially percussion instruments. Judicious setting of a noise gate's attack (turn-on) and release (turn-off) times adds "punch," or "tightens" the percussive sound, making it more pronounced.”

In its Technical Advice and Assistance section, technical editors explain how to deal with excess noise, enumerating subjects like The Genesis of Noise, How Alternator Noise Becomes Audible, Noise Filters, and Troubleshooting Tips.

Updating of these popular consumer advice and education sections is ongoing, and additional status reports will be forthcoming.

The Glossary can be found at http://www.electronixwarehouse.com/education/glossary.htm, and the section on how to eliminate noise at: http://www.electronixwarehouse.com/education/accessories/...

Established in 1999, Electronixwarehouse.com (http://www.electronixwarehouse.com/) is one of the oldest and most trusted suppliers of stereo, audio and general electronics equipment on the Web, offering tens of thousands of products with full warrantees and guaranteed satisfaction. Plus an extensive technical education section covering dozens of subjects to help consumers learn about products and applications before they make a purchase.
End
Source:D. Harbaugh
Email:***@metrodirect.net Email Verified
Tags:Audio, Stereo, Electronics, Car Stereo, Home Stereo, Personal Electronics, Marine Stereo
Industry:Electronics
Location:United States
Account Email Address Verified     Account Phone Number Verified     Disclaimer     Report Abuse
Page Updated Last on: Apr 25, 2012
MetroDirect Communicaitons News
Trending
Most Viewed
Daily News



Like PRLog?
9K2K1K
Click to Share