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  2. 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]

  3. NIOSH Power Tools Database - Wikipedia

    en.wikipedia.org/wiki/NIOSH_Power_Tools_Database

    A substantial part of this noise results from the use of power tools, which can produce dangerous levels of noise by themselves. [6] Although the loudness of power tools may be quite apparent to those using them, the actual level of noise produced was mostly unreported and not available easily in an online reference.

  4. 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]

  5. 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]

  6. Boy, 17, stabbed and e-bike stolen

    www.aol.com/boy-17-stabbed-e-bike-123726488.html

    Wiltshire Police is urging anyone who saw what happened to contact them by calling 101. Follow BBC Wiltshire on Facebook , X and Instagram . Send your story ideas to us on email or via WhatsApp on ...

  7. Krispy Kreme offers a free dozen Grinch green doughnuts: When ...

    www.aol.com/krispy-kreme-offers-free-dozen...

    Krispy Kreme's Original Glazed doughnuts will be green on Friday and Saturday, and the doughnut chain is offering customers a free dozen of the Original Glazed doughnuts with the purchase of any ...

  8. EPNdB - Wikipedia

    en.wikipedia.org/wiki/EPNdB

    The term "cumulative" EPNdB is the combination of the noise margins from the three ratings. It is defined as the sum of the individual margins (difference between certified noise level and noise limit) at takeoff lateral, takeoff flyover and approach. [4] It is important to make the distinction between loudness and noisiness.

  9. Missing hiker thanks rescuers after surviving 13 days on two ...

    www.aol.com/missing-hiker-found-alive-13...

    A 23-year-old hiker who survived 13 days lost in the Australian wilderness after stumbling on two granola bars has thanked his rescuers for enduring “tough conditions” to find him.

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