MCM Electronics

Digital Sound Level Meter with USB Interface and DataloggingMCM Part #: 72-947  |  Tenma Part #: 72-947

Digital Sound Level Meter with USB Interface and Datalogging 4 stars from 2 reviews.
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Sound Level Meter with USB Interface Flagship of the Tenma sound level meter line provides features normally exclusive to sound level meters costing much more. It is perfect for sound system testing, speaker system measurement and environmental noise level monitoring.

Product Description

  • USB interface with datalogging software
  • Internal datalogging of up to 20,000 records
  • A and C weighting
  • Selectable fast / slow response time
  • Analog bargraph display
  • Large 1999 count backlit LCD display analog bargraph and numerous on-screen icons
  • USB interface with included cable and datalogging software
  • Included AC adaptor or battery operation
  • Selectable MIN or MAX hold and data hold function
  • Three measurement ranges
  • Threaded insert which accepts standard tripod mount
  • 0.1dB resolution
  • Selectable auto-power-off
  • Rugged blow molded carry case
  • Removable windscreen
  • Includes manual and 9V battery

    Measurement ranges:

  • Low: 30 ~ 80dB
  • Medium: 50 ~ 100dB
  • High: 80 ~ 130dB
  • Auto: 30 ~ 130dB


  • Frequency range: 31.5Hz ~ 8KHz
  • Microphone element: 1/4" electret condenser
  • Sample rate: 0.5 seconds
  • Time weighting: 125mS (fast), 1 Sec. (slow)
  • Accuracy: ±1.4dB @ 1KHz, 94dB
  • DC output: 10mV/dB, 1KΩ load
  • AC output: 1VRMS per each range step, 100Ω load
  • Dimensions: 9¾" (L) x 2½" (W) x 1" (D)

  • Product Reviews

    • "Good SPL meter, but a realy poor manual." by JOHNMAIER on 9/1/2011
      Overall: 4 out of 5

      I was impressed by the meter its self, but the manual was written by someone with poor English and technical writing skills. It's going to take a lot of experimentation to figure out how to set up the additional features.

    • "Accurate Readings, but what about Self-Calibration?" by hendrikxix on 4/22/2009
      Overall: 4 out of 5

      I just received the meter and I have put it through a series of tests. Out of the box the meter seems to be very responsive and accurate. The instructions that come with the unit are really pretty poorly written and definitely translated from another language without much care. There is no mention in the directions about an internal oscillator or self-calibration. The section on calibration talks about using an external calibrator that is not included (sells for $250). My main reason for purchasing was the claim of self-calibration. The manual recommends yearly calibration. It does include a jeweler screwdriver to perform the calibration. The box is pretty nice and feature set seems excellent. I haven't tried the software yet. There appears to be no online information for the SPL meter other than what is available at MCM Electronics. The microphone connection to the unit is a little loose, but well secured. You wouldn't want to shake the meter anyway.

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    Package Specifications & Dimensions
    Weight:4.55 lbs.
    Warranty:365 days
    Need to Return?
    Length:15.75 in.
    Width:11.5 in.
    Height:4.25 in.
    Shipping Information
    Extra Shipping Charge:No
    Drop Ship:No
    Catalog Pages

    MCM Cat 57, Page 1289

    MCM Cat 56, Page 1131

    PDF Reference

    Requires Adobe Acrobat Reader.

    Mfr. Info

    Tenma Logo
    Mfr. Name:Tenma
    Mfr. Part Number:72-947
    Save at least 15% on all Tenma Test Equipment through Sunday. Use promo code EMC396.
    Save at least 15% on all Tenma Test Equipment through Sunday. Use promo code EMC396.