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Vernier Software & Technology

Sound Level Meter

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The Sound Level Meter measures sound level in decibels.

Description

The Sound Level Meter is used to measure sound level in decibels (dB). Switches on the meter are used to select dBA or dBC weightings and fast or slow response times. The Sound Level Meter has an LCD panel to use it as a stand-alone device. A Maximum Level Hold switch provide flexibility in the standalone mode.

If you are interested in collecting sound waves, use the Vernier Microphone.

Sample Data

Specifications

  • Sensor: ½” electret (prepolarized) condenser microphone
  • Power: Four AAA batteries
  • Battery life: 50 hours typical
  • Display: 3 ½” LCD
  • Measurement Range:

    • Low: 35 dB to 90 dB
    • High: 75 dB to 130 dB
  • Frequency Range: 31.5 Hz to 8000 Hz
  • Resolution: 0.1 dB
  • Accuracy: 1.5 dB (ref 94 dB @ 1 kHz)
  • Output:

    • DC: 10 mV/dB
    • AC: 1.0 Vrms corresponding to the top of the selected range
View the Sound Level Meter user manual

Experiments and Lab Ideas

Environmental Measurements

Environmental measurements can be made anywhere people spend significant amounts of time, such as their residence. The Department of Environmental Quality (DEQ) noise standard uses statistical sound level values that are applied to residential measurements. One of these measurements is the equivalent hourly sound level, Leq. You can collect sound level data with the Sound Level Meter set on “A” weighting and slow response. If you collect data for an hour and determine the average, you will have an estimate of Leq. These values can then be compared to the local DEQ standards.

Sound Isolation

Sound isolation is important in everyone’s life. People living near a freeway or an airport hear that difference when they go inside and close the door. Acoustical engineers work with architectural engineers to select materials that attenuate sound. For example, a wall constructed with gypsum board on a wooden frame will attenuate sound differently than a cinder block wall with the same area. A window with a single pane of glass will attenuate sound differently than a window with two panes of glass separated by an air space.

You can test this by doing the following experiment. Place a radio in a room that has an outside wall and a window. Tune the radio to an unused AM frequency so that you hear only static. Turn the volume up so that you can just hear the sound through the wall. Measure the sound level at the wall. Next measure the sound level at the window, and then measure the sound level within the room. How much did the sound level change? Did you notice a difference in frequency content?

Lab Ideas and Innovative Uses

Do you have an innovative use for Vernier technology? What about a favorite lab or demo? We love to hear what creative uses people have for our products. Please email them to innovativeuses@vernier.com

Compatibility Requirements

The Sound Level Meter may require a compatible interface and software. Choose a platform below to see compatible interface and software options.

What’s Included

  • Vernier Sound Level Meter
  • (1) Wind screen (black foam cover for the sensing element)
  • (4) AAA batteries (preinstalled in the meter)
  • (1) Cable to connect the sensor to a data-collection interface
  • View the Sound Level Meter user manual

Ordering Information

All prices are for U.S. educators.

NameOrder CodePriceQuantity
Sound Level MeterSLM-BTA$199

Support

Related Products

Educational use only: Vernier products are designed for educational use. They are not appropriate for industrial, medical, or commercial applications. Product usage disclaimer »

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