enow.com Web Search

Search results

1. Results from the WOW.Com Content Network

2. Sound level meter - Wikipedia

   en.wikipedia.org/wiki/Sound_level_meter

   A noise dosimeter (American) or noise dosemeter (British) is a specialized sound level meter intended specifically to measure the noise exposure of a person integrated over a period of time; usually to comply with Health and Safety regulations such as the Occupational Safety and Health (OSHA) 29 CFR 1910.95 Occupational Noise Exposure Standard ...

3. 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]

4. Sound pressure - Wikipedia

   en.wikipedia.org/wiki/Sound_pressure

   The main instrument for measuring sound levels in the environment is the sound level meter. Most sound level meters provide readings in A, C, and Z-weighted decibels and must meet international standards such as IEC 61672-2013 .

5. Noise measurement - Wikipedia

   en.wikipedia.org/wiki/Noise_measurement

   Noise may be measured using a sound level meter at the source of the noise. [23] [24] [25] Alternatively, an organization or company may measure a person's exposure to environmental noise in a workplace via a noise dosimeter. [26] The measurements taken using either of these methods will be evaluated according to the standards below.

6. Decibel - Wikipedia

   en.wikipedia.org/wiki/Decibel

   Such large measurement ranges are conveniently expressed in logarithmic scale: the base-10 logarithm of 10 12 is 12, which is expressed as a sound intensity level of 120 dB re 1 pW/m 2. The reference values of I and p in air have been chosen such that this corresponds approximately to a sound pressure level of 120 dB re 20 μPa.

7. Ambient noise level - Wikipedia

   en.wikipedia.org/wiki/Ambient_noise_level

   This is because 20 μPa is the faintest sound the human ear can detect. [5] A pascal is a newton per square meter. The centimeter-gram-second system of units, the reference sound pressure for measuring ambient noise level is 0.0002 dyn/cm 2, or 0.00002 N/m 2. [6] Most frequently ambient noise levels are measured using a frequency weighting ...