Video

Siemens Stiftung

Water as wave model

Video (00:07 minutes, without sound):
A stone is thrown into calm water, ripples are formed.

The vibrations emitted by a source of sound can be compared with the ripples or waves created when a stone is thrown into calm water.
It is, however, directly comparable only as far as the concentric shape of propagation is concerned. Looked at in detail, the vibrations are in fact very different.

Information and ideas:
Students can do the experiment themselves on an excursion out of school.

Relevant for teaching:
Acoustic phenomena
Sound/acoustics: parameters
Communication and understanding
Vibrations and waves


Dieses Material ist Teil einer Sammlung

Video

Siemens Stiftung

The Ear, Hearing and Hearing Impairment;: Tuning fork as "simple? sound

Video (00:10 minutes):
Example of a simple periodic sound signal is the relatively pure sound of a tuning fork. The video shows the oscilloscope graph!

The pure periodic sound is the simplest sound event. It corresponds to a regular sine vibration (= harmonic vibration) of pure frequency. The sound of a tuning fork is the nearest of all non-synthetic sound sources to this ideal.

Information and ideas:
Suitable for demonstration purposes but also good for self-study on the part of the students. Idea: show the video without sound to begin with. The students should then guess what sort of noise/sound it might be.

Relevant for teaching:
Acoustic phenomena
Sound/acoustics: parameters
Communication and understanding
Vibrations and waves

Medientypen

Video

Lernalter

11-18

Schlüsselwörter

Sound Wave (physics)

Sprachen

Englisch

Dieses Material ist Teil einer Sammlung

Video

Siemens Stiftung

The Ear, Hearing and Hearing Impairment: Test tone as purest sound signal

Video (00:04 minutes):
A simple monofrequent pure tone produced synthetically with a generator is a very pure tone. The video shows the oscilloscope graph.

A simple monofrequent pure tone produced synthetically with a generator can be even purer than any tuning fork tone.

Information and ideas:
Suitable for demonstration purposes but also good for self-study on the part of the students. Idea: show the film without sound to begin with. The students should then guess what sort of noise/sound it might be.

Relevant for teaching:
Acoustic phenomena
Sound/acoustics: parameters
Communication and understanding
Vibrations and waves

Medientypen

Video

Lernalter

11-18

Schlüsselwörter

Sound Wave (physics)

Sprachen

Englisch

Dieses Material ist Teil einer Sammlung