Way back in the 60s, as traffic levels spiralled out of control in New York, someone from the city’s Noise Abatement Commission stood with a microphone, a crude receiver, a phonograph and a test tone to try to objectively plot just how much louder things had become. It was one of the first sound level meters – and things have come a long way since then.
በእውነቱ ሀ የድምፅ ወይም የጩኸት ደረጃ ሜትር is ማንኛውም መሣሪያ that takes acoustic decibel measurements, working on the principle that changes in air pressure can be detected and recorded with objectivity in a standardised format. Today, they are highly sophisticated, reliable and accurate, typically consisting of a microphone, a preamplifier, a signal ማቀናበሪያ እና ማሳያ. They’re used across the industry spectrum by any አካል። መፈለግ ተቆጣጠር, measure or manage sound or noise levels – like factories, roads and rail, construction, sports, concerts, venues and so much more.
But the list of confusing jargon associated with sound level meters is almost as long as the list of different types of sound level meters out there on the market – so how can you narrow ወደታች your short-list for your particular industry, መተግበሪያ or needs?
ስለሚከተሉት በማሰብ ይጀምሩ
ያልተዋሃደ የጩኸት መጠን በቀላሉ የአሁኑን የድምፅ ደረጃ በእውነተኛ ጊዜ ያሳያል ፣ የተዋሃደ መሣሪያም በተወሰነ የጊዜ ገደብ ውስጥ አማካይ የድምፅ ደረጃ እሴት ይሰጥዎታል። ስለዚህ በትክክል በተረጋጋ የድምፅ ደረጃዎች ለቦታ ምርመራዎች ብቻ ከፈለጉ ለርካሽ የማይቀላቀል ቴክኖሎጂ ይሂዱ ፡፡ ለአብዛኞቹ ሌሎች የሙያ ወይም አካባቢያዊ የጩኸት ቁጥጥር ፣ የተዋሃደ አሃድ ትክክለኛ ምርጫ ነው ፡፡
Most modern sound level meters worth buying will be categorised as either መደብ (or Type) 1 or Class 2. While Class 2 is accurate and reliable enough for most applications, those who need extreme levels of accuracy should bump up the budget and go for Class 1. It will cost more, and it’s true that Class 2 noise level meters are usually perfectly high-performing for most tasks, but if those results are ever going to be challenged, there’s no doubt Class 1 has more credibility.
Specifically, we’re talking here about መደጋገም analysis, which will give the user extra information about the frequency ባንድ በኩል የሆነ መልክ of the sound being monitored. So if, for example, you are going to use that sound level meter to determine if and how much hearing protection is required for a particular application, you should probably shop for a device with 1/1 octave band capability. Environmental noise surveys, on the other hand, will benefit from 1/3 octave band capability as it will detect tones in the noise, while the most expensive Fast Fourier Transform ባህሪ is for extreme frequency detail.
Next up, think about what extra features or accessories you’ll need with your noise level meter setup. Acoustic calibrators, for ሥልጣን, will tell you if your meter is working correctly, a dosimeter is a smaller, wearable sound level meter, and then there are accessories like weather resistant kits for sound level meters that will be set and left.
Finally, it’s important to match your noise level meter with the necessary measuring range, the quality and style of the display, and what complexity of on-board መረጃ logging and analysis you require. But at the የቀኑ መጨረሻ, there are plenty of sound and device experts out there who will be more than happy to እርዳታ you make the perfect choice for your application, industry and budget.