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2. Sound level meter - Wikipedia

   en.wikipedia.org/wiki/Sound_level_meter

   A sound level meter (also called sound pressure level meter (SPL)) is used for acoustic measurements. It is commonly a hand-held instrument with a microphone. The best type of microphone for sound level meters is the condenser microphone, which combines precision with stability and reliability. [1]

3. Audio system measurements - Wikipedia

   en.wikipedia.org/wiki/Audio_system_measurements

   Most modern quality amplifiers have >110 dB dynamic range, [6] which approaches that of the human ear, usually taken as around 130 dB. See Programme levels. Phase distortion, Group delay, and Phase delay A perfect audio component will maintain the phase coherency of a signal over the full range of frequencies. Phase distortion can be extremely ...

4. Noise measurement - Wikipedia

   en.wikipedia.org/wiki/Noise_measurement

   When sound levels reach a high enough intensity, the sound, whether it is wanted or unwanted, may be damaging to hearing. [3] Environmental noise monitoring is the measurement of noise in an outdoor environment caused by transport (e.g. motor vehicles, aircraft, and trains), industry (e.g. machines) and recreational activities (e.g. music).

5. EBU R 128 - Wikipedia

   en.wikipedia.org/wiki/EBU_R_128

   EBU R 128 is a recommendation for loudness normalisation and maximum level of audio signals. It is primarily followed during audio mixing of television and radio programmes and adopted by broadcasters to measure and control programme loudness. [1]

6. Sound limiter - Wikipedia

   en.wikipedia.org/wiki/Sound_limiter

   Sound limiters are commonly installed at live music venues, including private venues and particularly those that host wedding receptions with live wedding bands. [ citation needed ] The visual indicator on the limiter works most commonly on a “ traffic light ” system: green = no problem, amber = sound levels approaching the threshold, red ...

7. 10 Old Tech Gadgets Worth a Pretty Penny Today

   www.aol.com/10-old-tech-gadgets-worth-140005518.html

   By enabling users to care for a virtual pet, the pocket-sized devices mimicked all the responsibilities of real pet ownership, including feeding, cleaning, and playing with their pixelated companions.

8. Man Told Girlfriend He Was Going Home for Dinner, Then Killed ...

   www.aol.com/man-told-girlfriend-going-home...

   An affidavit previously obtained by the local news stations stated that Jacob left his girlfriend's house, saying he was going to have dinner with his family.

9. Noise dosimeter - Wikipedia

   en.wikipedia.org/wiki/Noise_dosimeter

   By the time the PSEM standard was published, many major sound level meter companies – in both Europe and the USA had a dosimeter in their range. Noise dosimeters are worn by workers in order to track their sound exposure over a period of time. With the accuracy of a type 2 sound level meter, a majority of noise dosimeters measure within ±2 dB A.