Casella Wide Range Integrating Octave Band Sound Level Meter Type 1 with Standard Accessories

CEL-621-B1 Wide Range Integrating Octave Band Sound Level Meter Type 1 with Standard Accessories by Casella

Many environmental noise measurements require a complete knowledge of the variable noise level climate over a representative period of time. The CEL-621 meter is designed to satisfy this need as a short term measurement instrument. It can measure the popular max, min, peak and time average levels plus up to 5 statistical or percentile results for the overall run.

The wide 120 dB dynamic range means that the user does not need to worry about changing the input range settings as it will always be on the right range. The provision of the three popular frequency weightings and the three time weightings enable many different measurements to be taken by new and experienced users alike to correctly characterize the noise.

Key Benefits

• Wide dynamic range from 20 to 140 dB on single span
• A, C and Z simultaneous frequency weightings
• Slow, Fast and Impulse rms. time responses
• Large 240 x 320 pixel color ¼ VGA graphic display
• Easy to use menu structure
• Integrating capability for time average values plus peak
• Available with 5 statistical LN% values measured for broadband levels
• Available in ANSI/IEC class 1 and class 2 accuracy
• Available as broad band, octave or third octave band models
• Storage of all results simultaneously in a huge non-volatile memory
• Available as complete measurement kits with acoustic calibrator and case

Applications

For measurements of simple noise levels the instantaneous sound pressure level is often adequate. However, in many outdoor situations the noise levels are too variable or change too quickly to estimate the average level or exceedance levels correctly. The CEL-621 is designed to assist in the correct description of these difficult noise situations by providing the time average noise level with the 3, 4 and 5 dB exchange rates. Changing noise levels are properly integrating into the overall time average answer and displayed as the Leq (with Q=3). 5 LN% values (10%, 50%, 90%, 95% and 99%) are calculated and stored from the instantaneous sound levels. This enables the CEL-621 to correctly assess changing noise levels and provide the appropriate result for many short term community noise level surveys. Additional octave (1/3 oct) band filters in the B or C version of the CEL-621 provide for a comprehensive frequency analysis of tonal noise levels for noise control applications.