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Siemens Stiftung

Middle ear section

Graphic with detailed labeling:
Section view of human ear with the individual parts of the middle ear.

The middle ear is formed by an air-filled cavity lined with mucous membrane and consists mainly of the tympanic cavity and the Eustachian tube.
The tympanic cavity contains the ossicles "malleus?, "incus? and "stapes?.
These are joined together loosely and can move so that, with their help, vibrations from the eardrum can be picked up and transmitted to the inner ear.

Information and ideas:
Can be used in worksheet, worked on together via digital projector, as an overhead transparency.

Relevant for teaching:
The human body
Structure and function of a sensory organ

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Siemens Stiftung

The Ear, Hearing and Hearing Impairment: Hearing

Photo:
A girl holds her open hand up to her ear to signalise that she is listening. Introduction to the topic "hearing" but also to "listening".

We use our ears to hear with. The only visible part of the hearing organ is the pinna. It collects the sound and conducts it into the ear canal. If somebody wants to understand better, they automatically hold their hand up to the ear to increase the size of the funnel. That has no immediate effect but has, in the meantime, become a sort of automatic gesture.

Information and ideas:
Introductory picture to the subject "Hearing" and into the discussion of the hearing process. What happens after the sound is picked up by the pinna?

Relevant for teaching:
The human body
Structure and function of a sensory organ
Reception of stimuli and transmission of information

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Siemens Stiftung

The Ear, Hearing and Hearing Impairment: Effects of noise

Schematic diagram:
The graphic shows that - apart from physical effects - sound does not become noise until it reaches the brain.

Noise has effects on the physical and mental health of human beings. What the individual subjectively considers to be noise depends on a number of factors, for example the individual's own mood.

Information and ideas:
Can be used as introduction to topic "What are the effects of noise??.
Can also be used for illustration purposes: individual parts can be covered up (and then gradually uncovered in the course of the lesson).

Relevant for teaching:
Noise: causes, effect, protection

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Siemens Stiftung

The Ear, Hearing and Hearing Impairment: Diffraction

Graphic:
Diffraction of waves on encountering an obstacle.

The graphic shows possible diffraction effects according to aperture and wave length.

Information and ideas:
Diffraction arises in sound waves as well, for example at corners of buildings.
Further information regarding this graphic is available as information sheet on the media portal of the Siemens Stiftung.

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

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Siemens Stiftung

Das Mundinnere

Grafik, beschriftet:Abbildung des Mundinneren.Unsere Zähne zerschneiden und kauen die Nahrung. Die Zunge nimmt am Kauen, Saugen und Schlucken teil. Der Mundspeichel befeuchtet die Mundhöhle, was das Schlucken, Sprechen und Schmecken erst möglich macht.

Bild

Siemens Stiftung

; ;: Entire ear section - unlabeled

Unlabeled graphic:
Cross-section of the entire ear, for example, to be incorporated in presentations or for individual projection.

Cross-section of entire ear.

Information and ideas:
This graphic can be used to describe and explain the most important functional areas of the ear and their role in the hearing process.
The teacher can look at the graphic together with the students on the computer screen or get the students to do the labelling either on printouts or on the computer.

Relevant for teaching:
The human body
Structure and function of a sensory organ