EN 23741

Acoustics; determination of sound power levels of noise sources; precision methods for broad-band sources in reverberation rooms (identical with ISO 3741:1988)

1991-10-00

Hết hiệu lực

DIN EN 23741 (1991-11), IDT * NBN EN 23741 (1992), IDT * BS 4196-1 (1991-03-28), IDT * EN 23741 (1992), IDT * EN 23741 (1992), IDT * NF S31-022 (1992-02-01), IDT * ISO 3741 (1988-12), IDT * UNI EN 23741 (1992), IDT * SN EN 23741 (1992), IDT * OENORM EN 23741 (1992-07-01), IDT * SS-EN 23741 (1992-04-22), IDT * UNE 74031 (1993-05-19), IDT * TS 2710 (1977-04-28), IDT * AMD 6975, IDT * IST L 512 (1991), IDT * NEN-ISO 3741 (1992), IDT * NS-ISO 3741 (1992), IDT * STN EN 23741 (1995-09-01), IDT * NEN-ISO 3741:1992 en (1992-01-01), IDT

prEN 23741 (1991-04)

EN ISO 3741 (1999-08)

EN ISO 3741 (2010-10) * EN 23741 (1991-10) * EN ISO 3741 (2009-07) * prEN 23741 (1991-04) * EN ISO 3741 (1999-08)

Absorption * Acoustic measurement * Acoustic testing * Acoustics * Airborne noise emitted * Calibration * Concentration * Definitions * Determination * Environment * Filters * Handling * Humidity * Indications * Information * Loudness levels * Machines * Mathematical calculations * Measurement * Measuring environment * Measuring instruments * Measuring rooms * Measuring techniques * Measuring uncertainty * Microphones * Noise * Noise (environmental) * Noise measurements * Noise sources * Observation * Operating conditions * Position * Power levels * Reverberation * Reverberation room method * Reverberation rooms * Rooms * Sound * Sound absorption * Sound intensity * Sound level * Sound power * Sound pressure * Sound sources * Specification (approval) * Surfaces * Temperature * Testing * Tests * Volume (sound) * Sound levels * Engines

17.140.01. Các phép đo âm học và độ ồn nói chung