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Auto

Foto: Auto als typische Schall- und Lärmquelle im Verkehr.Ein PKW im Stadtverkehr produziert ca. 80 Dezibel.Hinweise und Ideen:Einstiegsbild oder zur Illustration.

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Speicherkraftwerk

Grafik:
Funktionsprinzip eines Speicherkraftwerks.

Beim Speicherkraftwerk wird von Natur aus nachfließendes Wasser mithilfe eines Stausees angestaut und für Bedarfsspitzen bevorratet. Das gestaute Wasser wird dann mittels Druckrohrleitungen zu den Turbinen des niedriger gelegenen Kraftwerks geführt. Die gesamte Lageenergie des Wassers im Speicherbecken ist also ein Energiespeicher für Spitzenzeiten. Kleinere Speicherkraftwerke verwenden Pelton-Turbinen, große Speicherkraftwerke (großer Druck und große Wassermenge) verwenden Francis-Turbinen.

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Sticking object into ear

Photo:
Do not stick objects in your ear! It can lead to eardrum injuries!

Don't stick anything in your ears! Pencils and other pointed or sharp instruments are particularly dangerous as they can very easily injure the eardrum! Even a cotton wool bud has caused serious injuries in the past, if, for example, you suddenly turn your head!

Information and ideas:
A situation that can be often observed in class. The picture can be used to introduce the subject "protection of the ear".
Possible questions:
What am I allowed to do to my ears?
What should I not do?
Why can a joke end up having serious consequences?

Relevant for teaching:
Hearing defects, hearing impairment
Personal health care

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The Ear, Hearing and Hearing Impairment;: Sense organ tongue

Photo:
The tongue as sense organ. We use it to taste with - sweet, sour, salty or bitter?

We can perceive tastes with our tongue. To do this we have receptors in different areas of our tongue.
Each region recognises a different sort of taste.
Very subtle differences, however, can usually only be distinguished with the help of the sense of smell!

Information and ideas:
Students can study the different regions and test them:
- bitter: back part of the tongue
- sour: right and left edges of the tongue, more to the back
- salty: middle - edges left and right
- sweet: tip of the tongue

Relevant for teaching:
The human body
Structure and function of a sense organ
Reception of stimuli and processing of information
Senses discover the environment

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The Ear, Hearing and Hearing Impairment: Sense of position - world not upside down

Photo:
Visual illustration of the sense of position at work: child is hanging upside down from bar and is not losing sense of direction.

We know even with our eyes closed whether we are upside down or whether we are holding our head down. Yes, even with our head down, we can see things the right way up. Our sense of position is the reason for that.

Information and ideas:
Use picture as introduction to sense of position: children enjoy such situations like this one at the playground. Children can tell the class and teacher when they become aware of their sense of position, (e.g. when they are on a roller coaster).

Relevant for teaching:
The human body
Structure and function of a sensory organ
Reception of stimuli and processing of information
Senses discover the environment

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The Ear, Hearing and Hearing Impairment; Teaching unit: From the drum to the eardrum: Resonance body piano

Photo:
Grand piano and piano are good examples of the great significance of resonance bodies with regard to volume and sound.

The frame and the air in the piano vibrate in resonance with the string that has just been struck. Whereas the more modern grand piano "fills" whole concert halls, its historical predecessor, the spinet, is just loud enough for the living-room. Apart from the volume the tone colour of the spinet is also much thinner. This comparison makes the importance of the resonance body very clear - both generally in the production of sound and specifically in music.

Information and ideas:
A practical example from the field of music shows how important the subjects of Physics and Acoustics are for the world of art and communication.

Relevant for teaching:
Sound/acoustics: parameters
Vibrations and waves

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The Ear, Hearing and Hearing Impairment: Police car

Photo:
Police car as typical road user.

Information and ideas:
Use picture to start discussion or for illustration purposes.

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Noise and concentration - for example music

Photo:
You can do homework more quickly with music on? Tests show this only applies to routine tasks. Otherwise music is more like disturbing noise.

Is music relaxing pleasure or a disturbing noise? This is a very subjective matter. Objectively the answer depends on the specific situation!

Information and ideas:
This question "Music on when doing homework?" is an evergreen. Maybe an objective answer can be reached using the criteria of concentration and effectiveness?

Relevant for teaching:
Hearing defects/hearing impairment
How hearing works
Damage to the sense organs
Noise
Personal health care

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Motorbike

Photo:
Motorcyclist as typical road user.

Above all, when motorbikes drive fast, they become loud road users, with levels of up to 80 decibels being recorded.

Information and ideas:
Use picture to start discussion or for illustration purposes.

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Incandescent lamp

Photo:
The light in this incandescent lamp is generated by heating a filament to high temperatures.


In many light sources, for example, incandescent lamps or high-pressure gas-discharge lamps, a continuous light spectrum is generated by the interaction of large numbers of photons at very different energy levels. This means that the complete range of wavelengths is included, but in different proportions depending on the temperature.
Incidentally, the wavelength and energy distribution of incandescent lamps fit the Planck radiation formula extremely well.

Information and ideas:
Example of how physical laws are translated into technical applications. Double-coiled filaments are used, among other reasons, to increase the radiant surface.