Useful for all age ranges, this dual range sensor accurately measures both sound pressure level in decibels (dBA) or waveform (mV).

To make the measurements meaningful to learners, the sensor has been designed to approximate the normal human ear in the range and intensity that it 'hears' sounds.

Activities

Physics:

• Sound frequency
• Speed of sound
• Sound insulation
• Sound decay
• Air resonance
• Sound waves: Monitoring the effect of altering frequency and amplitude, wave forms of musical instruments etc.

Biology:

• Ear design
• Animal activity studies

Environment:

• Noise pollution indoors and outdoors

The Sound sensor is an electret microphone with a broad frequency response (100 Hz to 7 kHz). It has a sufficiently fast response to allow for the measurement of speed of sound and to capture waveforms. It is equally responsive to all sound frequencies within its range and can measure both transient and continuous noise.