le son

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madi

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La vitesse de propagation du son dépend de la nature du milieu et de la température.
Le résultat sera égal à la température du soleil
Un son composé est périodique mais pas sinusoïdal. Son spectre possède plusieurs traits.
Un son pur est régulier et sinusoïdal, son spectre possède un seul trait.
Pour déterminer une période, il faut identifier le motif qui se répète (motif élémentaire), la période T est le temps de ce motif
T= temps d’un signal/ le nombre de périodes
La fréquence f se calcule par f= 1/T (résultat en Hz)
Fk= fréquence harmonique
F1= fréquence fondamentale qui se double (F2), se triple (F3),...
pour calculer Fk, on fait: k x F1 sachant que k est un nombre entier
A retenir: tout instrument joue des sons composés.
I= P/S
L= 10 x log(I/I0)

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le son

Cards (13)

3.1.1 Pathogens and Disease

1.10 Group 1

2.2.1 The Human Digestive System

1.1.2 Animal and Plant Cells

3.4 Mass Transport

8.3 Identification of ions by chemical and spectroscopic means

7.4.2 Decomposers

1.2.1 Primary Storage (Memory)

4.3.5 Representation of reactions at electrodes as half equations

5.2 Social distribution of crime

4.3.1 The process of electrolysis

1.2.2 Factors Affecting Enzyme Activity

1.3.2 Osmosis

2.3 Origins and Outbreak of the Second World War

4.1 DNA, Genes, and Chromosomes

4.1.1 The reactivity series

1.1.1 The Role and Functions of the Education System

2.1 Home, town, neighbourhood and region

8.2 Identification of common gases

5.3 Writing Analytical Responses

2.3 The Working Memory Model