What You Ought to Know About Noise or Sound Level Meters

The instrument which is capable of measuring the intensity of sound waves is the noise level meters. Sound features a series of waves that significantly travels through a medium like either air or water. So the louder the sound, the stronger is the pressure waves. Our ears receive these pressure waves and then perceived by our brains. The sounds we hear significantly range from things we love up to those annoyances that can be extremely harmful.

Noise MeterEvery waking moment of our everyday life, we are bombarded by sounds. Although most of those sounds are things which we usually love to hear, there are times in our modern world where there is heavy traffic, the sound of machinery and alarms that simply annoys us very much, and the explanation is that they are never are music to the eyes.

Noise has several effects on health, and that is a well-established fact. Hearing loss, heart disease, hypertension, sleep disturbance, stress as well as mental lapses are illnesses which results from hearing elevated sound levels. In fact, some noises don’t necessarily have to be particularly loud to cause these illnesses. Exposure to high noise levels comes regulated by occupational health agencies, laws and local ordinances as it brings severe health issues.

Thus, to ensure that the exposure to the sound is only below the threshold of what is considered safe, it is ideal that you get a noise meter.

Sound Measurement

Sound is a succession of pressure waves that significantly travel at a frequency detectable to the human ear, as mentioned earlier. Generally, about 20 to 20,000 Hz is the measurement; however, it may considerably vary between individuals. Decibel is the one used to measure the levels of sound. The decibel scale is in a logarithmic way rather than linear. It only means that every 10 dB on the scale is equivalent to a 10-fold increase in the intensity of sound. For humans, around 120 dB is the threshold of pain. Not only that, but you may experience permanent hearing damage even with only a brief exposure at the level.

An omnidirectional condensing microphone, electronic circuits and meter display is what a noise meter significantly consists. The microphone of the sound level meter features a flexible membrane that slightly moves once sound waves hit it. Those movements are then converted into an AC electrical signal that is an accurate electronic image of the sound waves. By a root-mean-square (RMS) detector unit, those AC signals are converted to DC. To effectively provide a direct readout in decibels, the output of the RMS circuit is linear in voltage and is significantly passed through a logarithmic circuit. To make measured results more precise and way accurate, most of the sound level meters include a variety of filters, amplifiers as well as user adjustments. A scale of about 30 to 130 dB is what the meter generally measure. To see more instruments, hop on this website.