Primärmaterial/Quelle

Siemens Stiftung

Ohr, Hören und Schwerhörigkeit: Ultraschall zur Materialuntersuchung

Webressource (en):
Umfassende Darstellung der Ultraschalluntersuchung von Werkstoffen in Theorie und Praxis.

Im Maschinenbau ist die Kontrolle der Qualität von Werkstoffen eine wichtige Aufgabe.
Eine kostengünstige Möglichkeit der Werkstoffprüfung, bei der das zu prüfende Material nicht zerstört wird, basiert auf der Reflexion von Schall an Grenzflächen.

Hinweise und Ideen:
Diese Aufgaben eignen sich gut dafür zu zeigen, wie Verhalten von Schall in der Praxis genutzt wird.
Die Recherche im Internet unterstützt zudem das explorative Lernen.

Unterrichtsbezug:
Schall/Akustik: Kenngrößen
Schwingungen und Wellen

Primärmaterial/Quelle

Siemens Stiftung

Ohr, Hören und Schwerhörigkeit: Musikinstrumente und ihre Funktionsweise

Website (en):
Opensource-Projekt zum Thema Musik, in dem auch viele Artikel zu Musikinstrumenten zu finden sind.

Internetadresse: Opensource-Projekt zum Thema Musik, in dem auch viele Artikel zu Musikinstrumenten zu finden sind.

Unterrichtsbezug:
Schall/Akustik: Kenngrößen
Schwingungen und Wellen

Bild

Siemens Stiftung

Frequency differentiation in the uncurled cochlea

Labeled graphic:
High-pitched tones are heard in the front part of the cochlea, low tones are heard in the back part.

As the sense of hearing is able to differentiate locations of the nerves, it is able to recognize the frequencies.

Information and ideas:
This graphic is good for creating a link between the topics of "Sound? and "Hearing?.
Further information regarding this graphic is available as information sheet on the media portal of the Siemens Stiftung.

Relevant for teaching:
Perception of sound
Human hearing ability
Communication and understanding
The human body
Structure and functions of a sensory organ

Bild

Siemens Stiftung

Entire ear section (b/w)

Unlabeled graphic:
Simple black and white cross-section of ear. For worksheets, printouts etc.

With the help of this graphic the most important functional areas of the ear and their significance in the hearing process can be explained.

Information and ideas:
The teacher can label the graphic together with the students on the computer screen or get the students to label it themselves either on a printout or at the computer screen.

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

Bild

Siemens Stiftung

Cotton wool buds

Photo:
Cotton wool buds.

Attention when cleaning ears: Cotton wool buds must not be pushed too far into the ear canal as this can injure the eardrum.

Information and ideas:
Use picture to start discussion on the topic of "Health care" and specifically "How to take care of ears".

Relevant for teaching:
Personal health care

Bild

Siemens Stiftung

Car

Photo:
Car as typical source of sound and noise in traffic.

A car in normal town traffic produces about 80 decibels.

Information and ideas:
Use picture to introduce topic or for illustration purposes.

Primärmaterial/Quelle

Siemens Stiftung

Otolaryngology

Website:
Website of the American Academy of Otolaryngology - Head and Neck Surgery.

The website offers a broad spectrum of information on the whole field of ear, nose and throat-related areas which goes way beyond the subjects of hearing and hearing impairment. The scientific level of the information requires a certain amount of basic knowledge.

Information and ideas:
Students can find detailed information here. A good reference site for teachers and parents as well.

Anderer Ressourcentyp

Siemens Stiftung

Speed of sound

Information sheet:
Speed of sound and how it is calculated.

The speed of sound is how fast sound propagates. It is not the frequency that is important here but the medium in which the sound is moving.

Information and ideas:
This information sheet gives a brief summary of the most important information on the speed of sound velocity. Exercises on the calculation of the speed of sound velocity help to understand the topic.

Relevant for teaching:
Sound/acoustics: parameters
Vibrations and waves
Measuring of sound


Dieses Material ist Teil einer Sammlung

Anderer Ressourcentyp

Siemens Stiftung

Sound - basics

Guideline:
Display of the parameters of sound and distinction of different sound types.

The most important basics about "Sound" - Definition, sound types, parameters, speed of sound etc - are presented together.

Information and ideas:
Logical structure for looking at the topic. Suitable for active and passive forms of learning.

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


Dieses Material ist Teil einer Sammlung

Bild

Siemens Stiftung

Tuning fork as "simple" sound

Graphic:
Oscilloscope graph of a tuning fork tone as example of a simple tone with visible upper harmonics in the starting phase of oscillation.

Tuning forks as well produce simple periodic tones but, strictly speaking, they are not really pure as there are several upper harmonics already overlapped.

Information and ideas:
Possible cross reference: Examination of aperiodic speech signals with the help of spectral analysis.
Further information on this graphic is available as information sheet on the media portal of the Siemens Stiftung.

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

Medientypen

Bild

Lernalter

11-18

Schlüsselwörter

Sound Wave (physics)

Sprachen

Englisch

Dieses Material ist Teil einer Sammlung