Acoustics. Testing of architectural acoustics. Determination of sound absorption coefficient and impedance in a tube.

1 Objet 2

1.1 But 2

1.2 Domaine d'application 2

2 Principe - Définitions 2

2.1 Principe 2

2.2 Définitions 3

3 Dispositif de mesurage 5

3.1 Tube à ondes stationnaires 5

3.2 Dispositif d'émission acoustique 7

3.3 Dispositif de mesurage des niveaux de pression acoustique 7

3.4 Dispositif de mesurage de la position du microphone 8

4 Préparation des éprouvettes - Fixation 8

4.1 Échantillonnage 8

4.2 Fixation 8

5 Conditions de mesurage 8

5.1 Fréquences de mesure 8

5.2 Centre acoustique de la sonde microphonique ou du microphone 8

5.3 Contrôle de l'équipement 9

5.4 Procédure de mesure 9

6 Présentation des résultats 10

7 Rapport d'essai 10

Figures 1 à 5 11

Annexe 13

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