搜尋結果
聲音的聲壓級如超逾某聲壓級值的累積時間達到百分n，則這個聲壓級值就是聲音的「累積百分n聲級」(n-Percent Exceeded Level)，符號為 L n。 我們可以利用統計學的方法來分析特定噪音的「累積百分n聲級」。
When noise or sound is measured in dB(A), it is customary to denote the equivalent continuous sound pressure level as L Aeq. Let us explain L eq or L Aeq by using an illustration. Please click on the demo button to see the details.
There are two sets of noise criteria or Basic Noise Levels, in dB(A), abbreviated as BNLs: BNLs contained in the Technical Memorandum on Noise from Construction Work in Designated Areas
Noise measurement. In acoustics, noise measurement can be for the purpose of measuring environmental noise [1] or measuring noise in the workplace. Applications include monitoring of construction sites, aircraft noise, road traffic noise, entertainment venues and neighborhood noise.
The most common measurement in environmental noise is the dB (A) level. It can be measured with a simple Sound Level Meter having an A-weighting filter to simulate the subjective response of the human ear. The dB (A) level is used to report ambient noise and noise intrusions, it is also used in computing L Aeq,T and L An,T.
Learning how to measure decibels is essential for monitoring sound levels. This way, you can avoid hazardous noise and keep your hearing safe. In this article, we’re going to explore why you should measure noise levels and how to measure sound. Plus, the effects of noise on your physical and psychological wellbeing.
A Sound Level Meter (SLM) is an instrument (commonly hand-held) that is designed to measure sound levels in a standardized way. It responds to sound in approximately the same way as the human ear and gives objective, reproducible measurements of sound
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