and limiting the sound power level of the equipment, will reduce the operational noise impact to within acceptable level. legco.gov.hk 這些措施包括經常在工地灑水、設置車輪清洗設施,以減少塵土飛揚 的情況,以及使用低噪音機器或設備,以減低噪音。我們會把噪音控 制措施納入抽水站設計內,包括設置隔音百...
This study has produced results indicating that the maximum permissible noise level should not exceed 70 dB(A) in the residential areas along the Shinkansen railway.doi:10.1016/S0022-460X(82)80038-2K. YamanakaT. NakagawaF. KobayashiS. Kanada...
Haptics in communication often suggest the level of intimacy. They are usually classified into two groups: high-contact and low-contact. Asia and quite surprisingly the United States, Canada and Britain belong to low-contact cultures. People from the rest of the world, such ...
The main advantage with dB(A) - the A weighted noise or sound measurement - is its adaption to how the human ear responses to sound - the human hearing, and the possibility to measure noise with "low cost" instruments Maximum acceptable Equivalent Sound Level - Leq - at some locations: ...
Calculations were carried out, in particular, for variants with variable thickness or surface of vibrating partition as well as various types of the construction material. Furthermore, the minimum vibration duration was determined for which the values of noise exceeded the sound level limits.SZELĄG...
The acoustic reduction index (A.R.I) relative to road traffic noise and in absolute terms is between 34 and 38 dB (A) and 31 and 36 dB (A) respectively. Specific values for the A.R.I. may be 35 dB (A) and 32 dB (A) respectively. The window may be single-glazed with 10 mm...
Results: Study results revealed that, on average, WDRC increased (worsened) ANL by 1.5 dB, while DNR and DIR decreased (improved) ANL by 1.1 and 2.8 dB, respectively. Because the effects of WDRC and DNR on ANL were opposite in direction...
To examine the impact on aircraft noise requirements of a change in emphasis, from vehicle economy to noise acceptability, existing literature was used to estimate the maximum noise exposure from aircraft that a community would probably find acceptable. The suggested limit is 90 卤 5 PNdB for ...