GB/T 4215-1984 (English Version) Determination of sound power levels of noise emitted by metal-cutting machine tools

Standard No.: GB/T 4215-1984
Language: Chinese, Available in English version
Release Date: 1984
Published By: General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
Status: Withdraw 2017-12
Latest: GB/T 4215-1984

Scope: This standard specifies the method for calculating the sound power level by measuring the sound pressure level on an imaginary enveloping machine tool measuring surface in an acoustic test environment with a free field above a reflecting plane. The data obtained are used to evaluate and compare machine tool noise sound power levels. The measurement methods in this standard are determined according to the acoustic test environment and measurement requirements, and the measurement methods are divided into engineering method, quasi-engineering method and simple method. The engineering method and quasi-engineering method are applicable to all kinds of machine tools that radiate steady-state, unsteady-state broadband noise or narrow-band noise, and are not applicable to machine tools that radiate pulse noise and whose linear scale exceeds 15m. The simple method is suitable for machine tools that radiate steady-state noise such as broadband, narrowband, and discrete frequencies. In addition to burst sounds with a repetition rate of less than 5 per second, it is also suitable for machine tools that radiate unsteady noise. There is no limit to the volume of the machine tool under test, and the part of the main noise source is selected for measurement of the oversized machine tool.

GB/T 4215-1984 history

1984 GB/T 4215-1984 Determination of sound power levels of noise emitted by metal-cutting machine tools