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Enhanced or increased leasing activity in office buildings resulting in higher building occupancy has also been attributed to increased floor vibration. Modern concrete under-floors often specify a 3mm layer of sound-deadening material above (is it foam plastic like ethaline - something with a long-life since it will be expensive to replace).
S05 Sound Reducing Surfaces, furnishing quality surfaces of room that meets criteria of tier 1 or 2, receiving 1 or 2 points, for example, open workspaces, minimum noise reduction coefficient (NRC) OR Alpha-w of 0.75 or 0.90 and minimum furniture height and NRC OR Alpha-w with minimum height of 1.2 m above finished floor and minimum 0.70 ...
Highway noise is today less affected by motor type, since the effects in higher speed are aerodynamic and tire noise related. Other contributions to the reduction of noise at the source are: improved tire tread designs for trucks in the 1970s, better shielding of diesel stacks in the 1980s, and local vehicle regulation of unmuffled vehicles. [13]
The noise floor limits the smallest measurement that can be taken with certainty since any measured amplitude can on average be no less than the noise floor. A common way to lower the noise floor in electronics systems is to cool the system to reduce thermal noise, when this is the major noise source. In special circumstances, the noise floor ...
Nightingale floors (鴬張り or 鶯張り, uguisubari) listen ⓘ are floors that make a squeaking sound when walked upon. These floors were used in the hallways of some temples and palaces, the most famous example being Nijō Castle, in Kyoto, Japan.
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Blasting mats are used when explosives are detonated in places such as quarries or construction sites. The mats are placed over the blasting area to contain the blast, suppress noise [1] and dust as well as prevent high velocity rock fragments called fly rock (or flyrock) from damaging structures, [2] people or the environment in proximity to the blast site. [3]
A half mat is called a hanjō (半畳), and a mat of three-quarter length is called a daimedatami (大目畳 or 台目畳), which is used in tea-ceremony rooms . [ 4 ] In Japan, the size of a room is usually measured in relation to the size of tatami mats ( -畳 , -jō ) , about 1.653 m 2 (17.79 sq ft) for a standard Nagoya-size tatami.
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