The 2Mb onboard memory stores time history as well as the measured parameters. Manual Measurements Press the Start key, shown on the right to begin the measurement process. An octave band is a frequency band where the highest frequency is twice the lowest frequency. For example, an octave filter with a centre frequency of 1kHz has a lower frequency of 707Hz and an upper frequency of 1. For the complete solution for outdoor environmental noise measurement our optimus outdoor measurement kits are ideal. To make this type of measurement, use the Menu key to set the meter to make repeating measurements of the required duration.
Real-time analyzers or octave-band analyzers are used to: Help determine the adequacy of various types of frequency-dependant noise controls; Select hearing protectors because they can measure the amount of attenuation how much a sound is weakened offered by the protectors in select octave bands; Analyze the frequency content of noise. With most modern meters you can set the filters to scan through from 31. Real-time analyzers or octave-band analyzers are special sound level meters that divide noise into its frequency components. More advanced instruments may be able to give a narrow band analysis of the noise data. Simple Sound Level Meters Designed for simple noise measurements with the very highest performance. The sound level meter itself is not weatherproof and will be damaged by rainfall.
Calibration details are stored in the meter so that you can either make note or download them to a computer if you have the data logging option. Real-Time Filters The sound level meter measures in all the bands at the same time. Operating Temperature Range 14 to 122°F -10 to 50°C Class 1 32 to 104°F 0 to 40°C Class 2 Effect of Humidity Less than ±0. The data logging history profile function adds the vital information to the run data by storing the changing pattern of noise levels to show exactly when significant event occurred making this the perfect sound level meter for dosimeter applications. Both exponential averaged and time integrated measurements may be made, with the capability of either internal or external data logging.
We stock a wide range of noise and sound level meters from leading manufactures such as Quest and Casella. Environmental Noise Measurement The Green version of the Optimus Sound Level Meter is ideal for almost any type of noise measurement, but it has been optimized for Environmental Noise Surveys. In this case additional data will be collected along with the audio. If you choose to enable it the meter make a recording of the audio during the measurement. The shows a typical octave band spectrum. This can be especially useful where the noise source of interest is transient. Periodic Summary Whenever you press Start and then Stop, you get a summary of the noise.
For assistance finding the optimal sound level meter for your noise measurement requirements or try our Acoustic Calibrators and Noise Measurement Kits For handheld instrument calibration see our acoustic calibrators below. The system is completely stand-alone, with the internal battery lasting up to 10 days. You can download the software to evaluate it before making a purchase. A tripod mount is included on the back of the meter. Regardless of the view selected, all data is measured and stored simultaneously so no mistakes can be made. You can even set it to trigger when the trigger level is exceeded in just one band to detect tonal noise.
When viewing the measurement on a computer the Play Voice Tag button lets you listen to the recording on the computer's speakers. Characters on display reverse direction depending on Hygro-Thermo-Anemometer or Light-Sound Mode. A simple dB A measurement may not have shown this. Rate and compare different noise sources with ease and exactness while simultaneously monitoring any number of measured parameters. The case holds the meter and battery pack, with room for accessories.
For example, you can set it to make a recording when the level exceeds 65dB A. These exposure levels represent conditions under which it is believed that nearly all workers may be repeatedly exposed without adverse effects on their ability to hear and understand normal speech…. Regardless of the view selected, all data is measured and stored simultaneously so no mistakes can be made. Average, peak, and octave band measurements are performed at the same time, so only one measurement needs to be made for all workplace noise applications. Some of our data logging meters are provided with software that makes these calculations for you. For even greater detail, each range of values can be divide in to smaller groups of three windows per octave.
This is called an octave band representation of the results, because it doubles each time. Recording Audio The meter can record the audio - so you can listen to the actual sound later. The VoiceTag stays with the measurement when it is transferred to the computer. The meter features a 70 dB dynamic range adjustable in 10 dB steps, allowing the user to set the most appropriate range for measurement. The advantage of real-time octave band filters is that measurements can be made quickly and none of the bands miss any of the noise during the measurement period.