Apparatus to Measure Acoustic Waves Velocity In Air

Supplied Equipment:

• 1 bench 50cm
• 2 supports
• 1 loudspeaker
• 1 microphone with amplifier
• 2 leads
• 2 BNC leads

You will also need: (not supplied)

• Acoustic signals generator
• Double trace oscilloscope

Using the bench you can measure the distance l (wave length) at which the delay is a period T. So:

V = Λ / T