Conversion of Sound Power Level to Sound Level Atr= 1 meter distance, the sound pressure level (SPL) of a point source is 11 dB less than its sound power level (SWL), whenQ= 1, the full sphere propagation is given. ForQ= 1 (full sphere propagation) the sound power level is equal ...
Question in the title... I see values stated like this and dont know whether they mean sound power level or sound pressure level: Noise level (ISO 2151): 66dB(A
This analysis will be useful for developing a system (unmanned aircraft systems Tracking and Reconnaissance System), which will be able to locate a small unmanned aircraft system using its sound power level, in a prefixed area. The investigation on sound power levels and sound...
The Sound Intensity Level can be expressed as: LI= 10 log (I / Iref)(3) where LI= sound intensity level (dB) I= sound intensity (W/m2) Iref= 10-12- reference sound intensity (W/m2) Sound Pressure Level Thesound pressureis the force(N)of a sound on a surface area(m2)perpendicula...
pressure level and the sound intensity level at the location of the receiver by also 6 dB, even if the sound power drops to a factor of 0.25, the sound pressure dropsto a factor of 0.5 and the sound intensity drops to a factor of 0.25. The reference value for the sound level was cho...
SOUND PRESSURE LEVEL AND SOUND POWER LEVEL DECLARATIONS: NAVIGATING THE MAZE 来自 掌桥科研 喜欢 0 阅读量: 1 作者: E Shanks 摘要: Under European law, noisy machinery supplied in Europe must be accompanied by a noise declaration. This requirement is defined in European Directives 2006/42/EC (...
The value of sound intensity level andsound pressure levelis almost the same LI= Lp- 0.2 (4) where Lp= sound pressure level (dB) Example - Sound Intensity and Pressure Level - Distance from Source The sound intensity - sound power transfer per unit surrounding surface - in a distance1 m...
Sound power report and results The final result of the ISO 3744 measurements is the sound-power level in frequency bands for the meteorological conditions at the time and place of the test, calculated based on surface time-averaged sound pressure level with a correction for background noise, inf...
由于声功率级,不能直接测量,通常是通过测量的声压计算声功率级和传输损耗。传输损耗TL消声器本身反映了声源,出口阻抗的传输特性。测量,测量入射声压,声压传递,然后计算出的传输损耗。目前,国外已开发出一种仪器直接测量的传输损耗,使现场测量的传输损耗。
aThe above results are computed to determine the mean sound pressure level and the mean sound power level. 上述结果被计算确定卑鄙声压级和卑鄙酣然的功率电平。[translate]