Learn more about hearing damage, including tinnitus and hearing loss, from excess noise through HHF’s Keep Listening campaign. While these guidelines and comparison are helpful, a basic rule of thumb is common sense: If it sounds too loud, it is too loud. With maximum readings actually as high as 119 dB on platforms and 120 dB on rides-based on actual recorded data within the sample-the subway system is an auditory minefield. The samples show the average noise levels on all subway platforms and on all subway rides (inside subway trains) is between 72.5 and 76.5 dB and between 74.1 and 75.8 dB, respectively. One decibel is one-tenth of one bel, a unit.
Decibel definition pro#
HHF used Decibel Meter Pro to record the noise levels of hundreds of New York City subways. The decibel (dB) is a unit that expresses the ratio of two values of a physical quantity, often power or intensity. Some apps even let you geo-tag the decibel level to a specific location, like your favorite restaurant or your workplace. Hearing conservation programs strive to prevent initial occupational hearing loss, preserve and protect remaining hearing, and equip workers with. As with a professional-grade meter, most phone apps can also show how the noise fluctuates over time, in real time, and provide numerical reference points that users can compare to their own sound levels. OSHA requires employers to implement a hearing conservation program when noise exposure is at or above 85 decibels averaged over 8 working hours, or an 8-hour time-weighted average (TWA).
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