Organes sensoriels

 
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Mélange de couleurs subjectif avec disque de Newton

Principle

Si un disque circulaire divisé en différents secteurs de couleur différente mis en rotation par un moteur suffisemment vite que l'œil ne peut plus distinguer les couleurs, une couleur mélangée est alors perçu. En variant ...

 
Détails

Numéro d´article: P0872500

Défauts de vision (maquette de la fonction oculaire)

Principe

Dans la myopie, le globe oculaire est trop long, mesuré du milieu du cristallin à l'arrière de l'œil. Les rayons lumineux qui pénètrent dans la lentille ne s'unissent pas sur la rétine après réfraction, mais ...

 
Détails

Numéro d´article: P1054300

Electrooculographie humaine (EOG) avec Cobra4

Principle

With this experiment, you can find evidence of the electrical activity that is generated during the movement of your eyes. Several electrodes attached to the skin of the face measure all the changes of the electrical voltage that are caused by the movement of the eyes. This ...

 
Détails

Numéro d´article: P1350460

Mesure des compétences en lecture

Principle

With this experiment, you can determine your own personal reading speed. One's reading speed can be trained and is an important prerequisite for the proper handling of all kinds of texts. You can precisely study the movement of your eyes during ... ...

 
Détails

Numéro d´article: P1522260

Fréquence de fusionnement et seuil acoustique

Principle

The hearing range depends greatly on age. While tones above the upper acoustic threshold are not perceived at all, individual sounds under the lower hearing threshold are perceived as a continuous deep tone (merging).

Benefits

  • Exciting experiment for all age groups
  • Simple ...
 
Détails

Numéro d´article: P4040101

Effet de gravité et force centrifuge sur les plantes

Principle

The main shoot of a plant generally follows a perpendicular direction away from the centre of gravity of the earth (negative geotropism), whereas the main root grows towards the centre of gravity (positive geotropism). If however the plant is placed on a rotating horizontal disk, ...

 
Détails

Numéro d´article: P4050200

Température préférentielle chez les insectes

Principle

The temperature requirements of animals with regard to their environment differ widely: they vary from temperatures just below 0°C for arctic and antarctic animals to temperatures of around 50°C for desert animals and animals from hot springs. Within these limits many species ...

 
Détails

Numéro d´article: P4060200

Détermination du champ de vision de l'homme

Principle

The part of the surroundings perceived with an unmoved eye is called the visual field. In contrast, the field of view is that part of the surroundings perceived by the eyes when allowed to move freely but without moving the head. Depending on the uneven distribution of rods and cones ...

 
Détails

Numéro d´article: P4070200

Capacité de résolution temporelle de l'?il humain

Avantages
  • La fonction périmétrique est semi-diagnostique, donc particulièrement adaptée à l'entraînement en phase préclinique.

 
Détails

Numéro d´article: P4070300

Test sur la capacité de réaction humaine

Principle

As in many technical processes, in the course of many biological functions the output values act back on the input values. With the many disturbing influences that affect biological systems, a feed-back reaction (control loop) of this type enables an equilibrium to be established ...

 
Détails

Numéro d´article: P4070400

Generation of sound waves

Principle

Sounds are generated by oscillations. The sound volume is influenced by their relative amplitude, while the sound pitch depends on their frequency. This relationship is examined based on three examples: oscillating ruler, tuning fork, string of a ...

 
Détails

Numéro d´article: P6010000

Propagation of sound in air

Principle

This experiment demonstrates, particularly clearly, the propagation of sound waves in air and, thereby, the working principle of the eardrum that is caused to oscillate by pressure waves. The movement of the membrane is transferred to the neighbouring air molecules, which in turn ...

 
Détails

Numéro d´article: P6010100

Propagation of sound in solid bodies

Principle

The transmission (or conduction) of sound through a solid body means: One end of the solid body is caused to oscillate (e.g. by placing a tuning fork on it). This oscillation propagates through the solid body to the other end of the solid body. The transmission through the solid ...

 
Détails

Numéro d´article: P6010200

Propagation of sound in water

Principle

The aim of this experiment is to enable the students to find out that sound can also propagate in other media, e.g. liquids. For this purpose, they study the propagation of the sound of a tuning fork in a tube that can be filled with air or water. For comparison, the sound ...

 
Détails

Numéro d´article: P6010300

Sound as a sine wave

Principle

The aim of this experiment is to familiarise the students with the "measure Acoustics" software. First, the students record the sounds of two tuning forks with a microphone. Then, they analyse the frequency spectrum and the course of the amplitude of the recorded signal over ...

 
Détails

Numéro d´article: P6010400

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