Harris Sound Wave Demonstration Set Age 4-5 The 120mm diameter aluminium disc

The 120mm diameter aluminium disc has a 20mm driving pulley

robust vinyl construction ensures durability

This multi-coloured parachute is made from durable

’ ‘Understanding Shape and Measuring

and green colours

Harris Sound Wave Demonstration Set Age 4-5 The 120mm diameter aluminium discApparatus for investigating wave phenomena using sound. The efficient transducers may be driven by the output from a standard audio signal generator, and their sensitivity as receivers is such that they may be used directly on the 5mV input of an oscilloscope. Detailed equipment notes are provided covering investigations into: reflection and refraction; interference patterns in air; detection and measurement of phase differences in a signal received