Standard Test Method for Measurement of the Normalized Insertion Loss of Doors

Importancia y uso:

5.1 This standard provides a method for testing the apparent sound insulating properties of doors in the field originally proposed by Morin (1).6 This allows doors to be evaluated with a result that has been found to be similar to the transmission loss.

5.2 The results of this measurement are the normalized door insertion loss, NDIL, at individual frequencies, and the single-number rating door transmission class, DTC. The insertion loss is normalized by the small change in sound level which occurs on the source side when the door is opened and closed. The results are in theory the same when measured in each direction through the door, but differences have been observed in practice.

5.3 Comparative measurements using this method and the method of Test Method E90 on the same door installations in a laboratory indicate good agreement between the transmission loss and normalized door insertion loss when the door is in a wall between two rooms and flanking is not significant. No similar verification has been done for corridors. See Appendix X1 and Ref (2).

5.4 The fixed-microphone and scanning methods have been compared in the field. See Appendix X2.

Subcomité:

E33.03

Referida por:

E1374-18E01, E3091-17R24, C0634-22, E0966-18A, E0336-23

Volúmen:

04.06

Número ICS:

91.060.50 (Doors and windows), 91.120.20 (Acoustics in buildings. Sound insulation)

Palabras clave:

door; door transmission class; field test; normalized door insertion loss;