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Above respective percentages of sleep stages for each median sound level for day time (08.00 22.00) and night time (22.00 08.00) are shown.
Through the simple on-screen display, users can adjust the location and sound level for each of the five surround channels.
Ten states and the U.S. Congress are considering so-called Quiet Car bills to study whether there should be rules about a minimum sound level for all vehicles.
Thus, the sound level for a vowel cannot be arbitrary small: there is a minimum amplitude step in vocal effort between silence and phonation with an hysteresis effect between starting and ending of phonation.
It has been noted that vehicles with the same sound levels can sometimes differ in terms of subjective noisiness, and over the years the continued use of the maximum A-weighted sound level for control purposes has been questioned.
A significant increase (95% CI > 1) in waking time was observed with a cutoff sound greater than 63 dBC during the day and greater than 59 dBC at night (Fig. 2). Figure 2a, b shows the median percentage of each sleep stage for each median sound level for day and night periods.
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A bill introduced in Congress this year and supported by the National Federation for the Blind would set minimum sound levels for hybrids.
Fearing's has three different indoor dining rooms with different looks and different sound levels for different moods, though the menu is the same in each.
In a recent paper, light-rail line noise exposures were predicted both in terms of maximum pass-by sound levels for comparison to APTA criteria and day night average sound levels for comparison to FTA criteria.
All manufacturers publish sound levels for their products and such figures should be scrutinized and compared as part of a purchasing decision.
The results show that global attenuation of broadband radiated sound levels for low to mid-range frequencies can be achieved with one or two control forces, irrespective of whether the system is on or off resonance.
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Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com