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Siemens Stiftung

Abnormal audiometric audibility limit

Chart:
Audiometric audibility limit of a person with hearing impairment compared to an intact sense of hearing shows handicap in speech range.

The speech range is that range of frequency and loudness where speech communication usually takes place. Within the audiometric audibility limit it is the kidney-shaped range. In our chart it is coloured blue. When, for example, hair cells are damaged in the inner ear and no longer work, the audiometric audibility limit changes. The speech range is affected.

Information and ideas:
An attempt at comparing charts showing normal hearing and reduced hearing can be done by students individually - as homework. It is useful for testing written expression (English) as well as for testing basic skills from Mathematics or Physics (how to interpret a chart, for example).

Relevant for teaching:
Hearing defects/hearing impairment
How hearing functions
Sound/acoustics

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Siemens Stiftung

The Ear, Hearing and Hearing Impairment: Middle ear section - labeling arrows

Unlabeled graphic:
Section view of human ear with the individual parts of the middle ear - with arrows for detailed labeling.

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

Medientypen

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Lernalter

11-18

Schlüsselwörter

Anatomy (human) Ear

Sprachen

Englisch

Dieses Material ist Teil einer Sammlung

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Siemens Stiftung

Der Herz- und Blutkreislauf

Grafik, beschriftet:Abbildung des Herz- und Blutkreislaufs.Das Herz befindet sich im linken Brustbereich unseres Körpers und hat vor allem die Funktion einer "Blutpumpe". Das Herz pumpt das Blut zu den Körperzellen und versorgt alle Gewebe mit Nährtsoffen und Sauerstoff.

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Siemens Stiftung

Energy Saving: Energy saving as an energy source

Schematic diagram:
On the basis of selected examples, this overview demonstrates that energy saving itself can be described as an "energy source.?

Five examples from everyday life (electric power and heat generation, power distribution, construction, lighting, and transportation) are used to show how energy saving reduces the consumption of individual energy sources (primary or secondary).

Information and ideas:
Students can look for further examples. What is the significance of energy saving in relation to the general scarcity of resources? Can it be equated roughly with the harnessing of renewable energy sources?


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Siemens Stiftung

Hearing aids seen historically

Photo:
Old woman with ear trumpet.

Over the course of time, hearing aid technology has made enormous progress, thus making the lives of hearing-impaired people much easier.
Before 1878 there were practically only mechanical hearing aids based on the sound funnel principle.
The photo shows Madame de Meuron, born in 1882 in Bern, Switzerland; died in 1980 in Riggisberg. She preferred using an ear trumpet throughout her life, arguing that then she had to hear only what she wanted to hear.

Information and ideas:
Elementary school students can use paper to easily recreate the old hearing aids in the form of ear trumpets. In this way they can understand the simplest effect of sound amplification.

Relevant for teaching:
Hearing damage/hearing impairment
How hearing works
Sound transduction


Dieses Material ist Teil einer Sammlung

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Siemens Stiftung

Functional areas of the ear

Labeled graphic:
The whole ear from the functional standpoints "sound conduction? and "sound perception?. Important to understand hearing damage.

In the sound conduction system of the outer and middle ear, the sound wave is retained in its original type; the vibrations are simply amplified and passed on. When the sound wave is introduced into the sound perception system of the inner ear, a mechanical transformation into a traveling wave takes place, which the receptor cells then transform into electric nerve impulses.

Information and ideas:
Here the question can be raised as to what extent a weakening or interruption of this system leads to a reduction of hearing ability.

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


Dieses Material ist Teil einer Sammlung

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Siemens Stiftung

Sense organ eye

Photo:
The eye as sense organ. It does not just differentiate between brightness and colour but also shape.

The eye is a ball that is located in a cavity in our skull. It consists mainly of the cornea, the lens and the retina.
The light perceived is beamed first of all by the lens. The retina with its sensory cells is at the back of the eye, this is where the image spots arrive from where they are transmitted via the optical nerve to the brain.
In the brain the whole image is then put together.

Information and ideas:
Explanation of how the eye works can be done, for example, by showing the students a camera:
lens: lens of the camera
retina: film
brain: development of the film

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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Siemens Stiftung

Sense of rotation

Photo:
A child turns its head while sitting on a swivel chair. Why does it get dizzy?

Simple experiment for the students to try out themselves.

Information and ideas:
Typical situations which the children know from their own everyday life:
- Turning on a chair
- Rides on roundabouts
- Turning quickly in a circle
etc.

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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Siemens Stiftung

Normal audiometric audibility limit

Chart:
Audiometric audibility limit of a person with normal hearing with typical frequency and loudness ranges for speech and music.

The speech range is that range of frequency and loudness where speech communication usually takes place. Within the audiometric audibility limit it is the kidney-shaped range. In our diagram it is coloured blue.

Information and ideas:
An attempt at comparing diagrams showing normal hearing and reduced hearing can be done by students individually - as homework. It is useful for testing written expression (English) as well as for testing basic skills from Mathematics or Physics (how to interpret a diagram, for example).

Relevant for teaching:
Hearing defects/hearing impairment
How hearing functions
Sound/acoustics

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Siemens Stiftung

How does a shark hear?

Graphic:
Shark and its hearing organ (lateral-line organ).

The shark as an example of an animal that mainly hears with its body surface. The sense of hearing (lateral-line organ) is sketched in.
Information and ideas:
Picture to introduce topic "How do animals communicate with each other?".
Further information regarding this graphic is available as information sheet on the media portal of the Siemens Stiftung

Relevant for teaching:
Sound/acoustics: hearing range, hearing frequency limit
Communication, Understanding