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Mar 2, 2015 · The volume of sound is measured in decibel (dB), which are a measure of air pressure. Sound pressure level (SPL) or sound level Lp is a logarithmic measure of the effective sound pressure of a sound relative to a reference value.
- The sound intensity is $I = \xi^2 \omega^2 c \rho$ where $\xi$ is the particle displacement, $\omega$ the frequency, $c$ the speed of sound and $\...
- The "volume of sound" is usually measured as sound pressure level (SPL), which is a measure of air pressure, in decibel (dB) units: Sound pressure...
- Propagation speed in an ideal gas varies as the square root of pressure . It also depends on the adiabatic index, the density of the gas, and the t...
Royalty-free pressure air sound effects. Download a sound effect to use in your next project.
引用: 原帖由 夢戀 於 15-11-2011 19:49 發表 前幾日先搵番支牧童笛 完全係新手一個-__-我想問一下點解我最高吹到d'音 e'或以上既音會變番做低音
Jul 16, 2014 · First off, if the noise is coming from the oil pan area and is loud, it is most likely the IPR is not closing completely. There should be almost no noise from any location if the system is intact. If it is closing, then you need to localize the sound better.
Aug 7, 2011 · Loudness of a sound decreases when air pressure decreases. No sound can travel in a vacuum. However, does this mean that higher air pressure would result in louder noises?
Apr 6, 2011 · 辯論. 兒歌、遊戲、動漫卡通類牧童笛譜. 標題. 作者. 回復/查看. 最後發表. 喜歡笨笨網站及論壇就比個 Like 同 Share 出去啦！. 蛙 4-6-2011. 7 / 17005.
