enow.com Web Search

Search results

1. Results from the WOW.Com Content Network

2. A-weighting - Wikipedia

   en.wikipedia.org/wiki/A-weighting

   A graph of the A-, B-, C- and D-weightings across the frequency range 10 Hz – 20 kHz Video illustrating A-weighting by analyzing a sine sweep (contains audio). A-weighting is a form of frequency weighting and the most commonly used of a family of curves defined in the International standard IEC 61672:2003 and various national standards relating to the measurement of sound pressure level. [1]

3. dBrn - Wikipedia

   en.wikipedia.org/wiki/DBrn

   The symbol dBrn or dB(rn) is an abbreviation for decibels above reference noise.. Weighted noise power in dB is referred to 1.0 picowatt.Thus, 0 dBrn = -90 dBm.Use of 144 line, 144-receiver, or C-message weighting, or flat weighting, can be indicated in parentheses.

4. Dynamic range - Wikipedia

   en.wikipedia.org/wiki/Dynamic_range

   Multiple noise processes determine the noise floor of a system. Noise can be picked up from microphone self-noise, preamp noise, wiring and interconnection noise, media noise, etc. Early 78 rpm phonograph discs had a dynamic range of up to 40 dB, [24] soon reduced to 30 dB and worse due to wear from repeated play. Vinyl microgroove phonograph ...

5. News, Politics, Sports, Mail & Latest Headlines - AOL.com

   homepage.aol.com

   Discover the latest breaking news in the U.S. and around the world — politics, weather, entertainment, lifestyle, finance, sports and much more.

6. Decibel - Wikipedia

   en.wikipedia.org/wiki/Decibel

   The decibel (symbol: dB) is a relative unit of measurement equal to one tenth of a bel (B). It expresses the ratio of two values of a power or root-power quantity on a logarithmic scale. Two signals whose levels differ by one decibel have a power ratio of 10 1/10 (approximately 1.26) or root-power ratio of 10 1/20 (approximately 1.12). [1] [2]

7. Sound transmission class - Wikipedia

   en.wikipedia.org/wiki/Sound_transmission_class

   A 0.1% open area will reduce the transmission loss from 40 dB to 30 dB, which is typical of walls where caulking has not been applied effectively [26] Partitions that are inadequately sealed and contain back-to-back electrical boxes, untreated recessed lighting and unsealed pipes offer flanking paths for sound and significant leakage. [27]