Sound frequency generator and oscilloscope in a single piece of equipment

For most quantitative experiments in acoustics, it is necessary to have an oscilloscope and a sound generator. This is the only way that such terms as pitch, volume and tonal colour can be illustrated clearly. Sufficient quantities of a student set with both these pieces of equipment would not be feasible in terms of both cost and space. However, the MGA can fulfil both roles at once in the ACOUSTICS 2 ADDESTATION set, taking up a minimum of room and doing the job perfectly. It can provide sinusoidal oscillations at frequencies between 10 and 3000 Hz, pulse signals and even the first five harmonics for a given frequency all at once, either all at the same amplitudes or with different amplitudes.

Impressive experiments

With the MGA it is possible to find out about the most important phenomena and physical laws by experiment in a highly impressive way. For instance, it is simple to create a wide variety of sound colours and analyse them. The ideas of pitch, tone and noise can be clearly defined, graphically depicted and easily distinguished. The frequency of the supplied tuning fork can not only be determined directly but also checked by means of an experiment on beats. The speed of sound in air can be determined simply by an easily understandable measuring procedure and the Doppler effect can be demonstrated very clearly.


01.01.10 Storage box

15.02.00 Inlay with cut-outs for A2

16.03.40 Little hammer

15.04.00 Sound sensor on stand

15.04.10 Amplifier A

15.05.10 Speaker

15.06.00 Sound tube stand (2 pieces)

15.07.00 Tuning fork 384 Hz

15.08.00 Resonance body A2

15.09.00 Reflector plate A2

15.10.00 2 batteries in container

63.13.00 Plate holder K3

01.19.00 Measuring tape 2 m

07.20.00 Woolen cloth

Additionally required:

00.10.00 MGA

15.12.00 Long sound tube

15.13.00 Short sound tube


A2-1:   Types of sound we can hear

A2-2:   Volume

A2-3:   Pitch

A2-4:   Sensitivity of human hearing

A2-5:   Lowest audible frequencies

A2-6:   Tonal colour and harmonics

A2-7:   Voiced and non-voiced sounds

A2-8:   Reflection and echoes

A2-9:   Determining the speed of sound

A2-10: Sonic radar

A2-11: Beats

A2-12: Resonance

A2-13: Standing sound waves

A2-14: Doppler effect