Bild

Siemens Stiftung

The watering can as a trumpet

Photo:
Child blows into a watering can, thus producing relatively loud trumpet-like sounds.

By pressing the current of air between its lips, the child produces the original vibration. In addition, the entire air volume in the watering can is stimulated to start vibrating. The sound gets louder. At certain pitches, the watering can volume vibrates more or less. As in our case it is the lower pitched tones that tend to vibrate, the watering can trumpet produces a relatively muffled sound.

Information and ideas:
Easy experiment to do in class. Then comparisons can be made to various different musical instruments which work on this very principle.

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

Medientypen

Bild

Lernalter

6-18

Schlüsselwörter

Sound

Sprachen

Englisch

Bild

Siemens Stiftung

Sound reflection

Graphic:
When sound waves hit an obstacle, they can be reflected in a similar way to light.

When a sound wave hits a large, hard surface, sound reflection occurs:
Sound is reflected by the surface just as light is reflected by a mirror.

Information and ideas:
Reference to students' everyday world: Echo in the mountains.
Can be checked with the students in an experiment.

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

Medientypen

Bild

Lernalter

11-18

Schlüsselwörter

Sound Wave (physics)

Sprachen

Englisch

Bild

Siemens Stiftung

Sound diffraction

Graphic:
Diffraction is a typical feature of sound waves when they meet an obstacle.

The diffraction of sound waves is a physical mechanism which ensures the entry of sound waves into acoustic shadows.
That means the sound is audible in areas which are cut off from the direct sound incidence, such as behind obstacles.

Information and ideas:
Diffraction of light can be proved when a parallel ray beam of monochrome light is directed at a narrow opening. A screen set up behind the opening gives us a diffraction figure (bright and dark stripes that lose intensity the further outwards they are). With sound, a direct reference to the students' everyday world is even easier: Why can you hear noise from a street in front of a building even when you are behind the building?
Further information about this graphic is provided as an information sheet on the media portal of the Siemens Stiftung.

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

Medientypen

Bild

Lernalter

13-18

Schlüsselwörter

Chart Optics Sound Wave (physics)

Sprachen

Englisch

Website

Siemens Stiftung

The Ear, Hearing and Hearing Impairment: Musical instruments and how they function

Website: Open source project on music where there are lots of articles on musical instruments. Open source project on music where there are lots of articles on musical instruments. Relevant for teaching: Sound/acoustics: parameters Vibrations and waves

Primärmaterial/Quelle

Siemens Stiftung

The Ear, Hearing and Hearing Impairment: Our sense of hearing

Web resource:
Instructions on conducting experiment and worksheet with questions to be answered.

The topic of directional hearing makes it clear how extremely sensitive the human sense of hearing is and also how well the ear can differentiate sounds and directions.

Information and ideas:
Very suitable for independent student study work as it involves self-experience-based learning.

Bild

Siemens Stiftung

Auditory path - brain parts hearing

Labeled graphic:
"Auditory pathway? describes route taken by auditory nerve impulses in and through the brain. But the hearing process is not over yet.

The auditory pathway is the nerve tract for the sensation of hearing.
People used to think that the senses were more localised. Now we know that apart from the auditory pathway, lots of other parts of the brain are involved, too - parts that are also used by the other senses. It is this that makes it possible for human intelligence to understand abstract concepts beyond the mere recognition of patterns. To be able to understand the complex facts of a complex sentence does, after all, involves more than recognizing the words together.

Information and ideas:
Further information regarding this graphic is available as information sheet on the media portal of the Siemens Stiftung.

Relevant for teaching:
Reception and processing of information
Perception, recognition, action

Primärmaterial/Quelle

Siemens Stiftung

The Ear, Hearing and Hearing Impairment: Ultrasound materials testing

Web resource:
"Non-destructive Material Testing with Ultrasonic". Detailed description of ultrasound testing in theory and practice.

In engineering the checking of the quality of materials is an important task. A cheap way of testing materials where the material to be tested is not destroyed is based on the reflection of sound on interfaces.

Information and ideas:
These tasks are good for showing how behavior of sound is used in practice.
Furthermore, Internet inquiry is good for explorative learning.

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

Bildungsbereiche

Allgemeinbildende Schule Sekundarstufe II

Fach- und Sachgebiete

Physik

Medientypen

Primärmaterial/Quelle

Lernalter

16-18

Schlüsselwörter

Sound Wave (physics)

Sprachen

Englisch

Audio

Siemens Stiftung

The Ear, Hearing and Hearing Impairment: Speech as highly complex sound signal

Recording:
A sentence spoken which also serves as an example of frequency-spectographical analysis in the topic "Types of sound".

Speech sounds are fluctuating sound signals where the composition of frequencies changes all the time.

Aperiodical overlap periodical parts. Unlike noises, some of which have similar frequency curves, sound in speech is always the carrier of meaning or of messages sent out by the speaker. Other noises like smacking of lips, hissing, rhythms, basic pitch are typical of the individual (acoustic fingerprint) but not essential for the speech content!

Information and ideas:
Supplementary to worksheets and transparencies.

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

Audio

Siemens Stiftung

Mouse squeaking

Recording:
Some animals make loud noises, some of the very high-pitched, almost inaudible sounds like, for example, the mouse.

We can just about hear a mouse squeaking.

Information and ideas:
Recording to be identified by students or used for sound effects for a recorded play/story.

Relevant for teaching:
Noise: causes, effect, protection
Noise consumption and leisure-time activities
Senses discover the environment

Lernkontrolle

Siemens Stiftung

What is an oscillation? (test)

Multiple-choice test (interactive):
Five questions related to oscillation.

The questions ask what determines the pitch and volume of a sound and what oscillation, amplitude, and frequency are. Only one of the three answers is correct for each question.

Information and ideas:
The test can be conducted in one of two ways.
· Each answer is checked immediately. If the answer is incorrect, the student can repeat the question.
· The answers are not checked until the end of the test.


Dieses Material ist Teil einer Sammlung