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Sound Meter Info

 

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Bosworth Instrument                How to Measure Sound in Decibels
              TECH TIPS

SDL600 Sound Meter SD Logger  
Overview
The decibel (abbreviated dB) is the unit used to measure the intensity of a sound. On the decibel scale, the smallest audible sound (near total silence) is 0 dB. A sound 10 times more powerful is 10 dB. A sound 100 times more powerful than near total silence is 20 dB. View Sound Meters.
 
 407732k.jpg
What is ‘A’ and ‘C’ Frequency Weighting?
Frequency “weighting” selections allow the user to choose how the meter will treat sound measurements over the meter’s specified frequency range. In ‘A’ weighting mode, the meter gives more “weight” to certain frequencies. In other words, sound levels at certain frequencies will be boosted or cut (to match how the human ear responds to sound). “A” weighting is useful for OSHA compliance testing. The “C” weighting selection provides a more “flat” response,meaning that all frequencies are treated basically the same (no boosting or cutting of sound level). “C” weighting is suitable for machine analysis and diagnostics. View 40772-Kit.
 
 
 
What is the significance of FAST / SLOW Response Time?
Response Time selections refer to how fast or slow the meter will respond to sound. Most meters have a slow and a fast selection. “Slow” response is most often used for hearing conservation/OSHA programs and is an “averaging” of sound level over time. “Fast” response is most commonly used for product noise reduction efforts and can detect quick noise bursts (For example: fireworks).
  Sound Level  Datalogger
What is a Sound Level Datalogger?
The HD600 Datalogging Sound Level meter measures, displays, and stores sound level measurement data. Up to 20,000 readings can be stored in the meter, each with the date and time stamp. Readings can be recalled on the meter’s display or they can be downloaded to a PC. Included software permits the user to view, graph, print, and export data to a spreadsheet. View HD600.

Sound Level Chart-Decibel Levels

dB Level
Activity
Painful
 
150
fireworks at 3 feet
140
firearms, jet engine
130
jackhammer
120
jet plane takeoff, siren
Extremely Loud
 
110
max output of some MP3 players, chain saw
106
gas lawn mower, snowblower
100
hand drill, pneumatic drill
90
subway, passing motorcycle
110
max output of some MP3 players, chain saw
106
gas lawn mower, snowblower
90
subway, passing motorcycle
Very Loud
 
80–90 
blow-dryer, kitchen blender, food processor
70
busy traffic, vacuum cleaner, alarm clock
Moderate
 
60
typical conversation, dishwasher, clothes dryer
50
moderate rainfall
40
quiet room
Faint
 
30
whisper, quiet library


 
 
 
 
 

Bosworth Instrument 1995 E. 55th St.  Cleveland, OH 44103  |  800-804-6216  |  info@bosworthsupply.com

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