“Sound limiter”的意思、由来-开放百科全书

A sound limiter or noise limiter is a digital device fitted with a microphone to measure the sound pressure level of environmental noise, expressed by the decibel logarithmic unit (dB). If the environmental noise level as measured by the microphone exceeds a pre-set level for a certain amount of time (e.g. 5 seconds), the limiter’s circuitry will cut the power supply to the musical equipment and PA system for a brief amount of time.

Sound limiters are commonly installed at live music venues, including private venues and particularly those that host wedding receptions with live wedding bands.^[1]

The visual indicator on the limiter works most commonly on a “traffic light” system: green = no problem, amber = sound levels approaching the threshold, red = threshold breached. If the light stays red for more than a few seconds, then the limiter will take action and cut the power.^[2]

Although there is no legal requirement to install a sound limiter, they are a reasonably inexpensive piece of equipment, which can help prevent complaints as part of a sound control plan and also protect the health of your staff by ensuring that the levels do not exceed those set by The Control of Noise at Work regulations 2005.^[3]

References

1. ^{{cite web|url=https://www.fixthemusic.com/sound-limiters-guide/|title=Sound Limiters — A Guide for Bookers|author1=Adam Southall|author2=FixTheMusic|publisher=}}
2. ^{{cite web|url=http://www.daftonline.co.uk/sound-limiters-what-you-need-to-know|title=Sound Limiters. What you need to know.|author=Graeme Nash}}
3. ^{{cite web|url=http://www.elmbridge.gov.uk/envhealth/noise/limiter.htm|title=Noise Limiter Devices|author1=Elmbridge Borough Council|author2= Donna Wade|author3= dwade@elmbridge.gov.uk|publisher=}}