Speed of Sound Apparatus

Item # 97-6700

Regular price $159.00
Regular price Sale price On Sale $159.00
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The Speed of Sound Apparatus determines the speed of sound easily by measuring the time taken for the sound to travel between two microphones.

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Additional Details

This easy-to-use apparatus for determining the speed of sound in air ties quantitative evidence to a conceptual definition of sound. The unit contains two sensitive microphones connected to a control circuity that will start and stop a millisecond timer. Alternatively, the outputs may be monitored on a storage or pc oscilloscope. The apparatus produces a sharp sound in line with the two microphones and then records the time taken for the sound to travel between them. The speed of sound apparatus is supplied with a 9V battery, a 6-meter connecting cable, and full instructions.

WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information go to

Products being sold are not toys. They are for Educational / Laboratory use only. They are not for use by children 12 and under.


What’s Included

  • 1 x microphone control unit 
  • 1 x microphone slave unit 
  • 1 x 9 V PP3 Battery 
  • 1 x 6 m connecting cable

Features & Specs


  • Dedicated unit for a time of flight method to measure the speed of sound in air 
  • Little setup/configuration required 
  • Easy to understand and interpret method 
  • Versatility - demo using a timer for instant time delay read out, or extend to a lab activity using oscilloscope connections to see independent sound signals 


  • Dimensions: L x W x H: 100 x 110 x 65 mm 
  • Weight: 375g 
  • Input Voltage: 9V PP3 Battery


Order Qty Price Qty for Discount Discount Price Total Savings
Millisecond Timer Millisecond Timer Item # 52-4000