Wireless sound sensor

CMA wireless sound sensor measures sound pressure levels in decibels (dB) using a condenser microphone.
The sound sensor is equipped with an OLED color display which shows sensor information and the measured values. This makes the sensor suitable to use as an independent measuring instrument.

The sensor can be used wirelessly via Bluetooth or wired via USB with the Coach 7 or Coach 7 lite programs/apps on computers (Windows and Mac), Chromebooks and mobile devices (Android and iOS).
The sound sensor supports A-weighting (dBA) for human hearing response and offers adjustable measurement ranges for different environments. The selected sound range is displayed on the screen.

Technical specifications:

• Measuring ranges:
  • 40 ~ 80 dB
  • 60 ~ 100 dB
  • 80 ~ 120 dB
• Resolution: 0.1 dB
• Warrantee: 36 months
• OLED display: 0.96” 128 x 64px
• Maximal sampling rate: 1 Hz
• Battery life: 8h when fully charged (rechargeable)
• Connection: Bluetooth 5, Low Energy (Mac, Android, iOS) Bluetooth 2.1, Classic (Windows) or USB-C 2.0

All specifications of the sensor are described it its Product manual, see downloads.

Suggested physics experiments:

• Measuring sound levels in different environments
• Investigating the effect of distance on sound intensity
• Comparing sound levels of different sound sources
• Testing the effect of sound insulation
• Investigating the effect of frequency on sound intensity
• Investigating the logarithmic nature of the decibel scale