ASME PTC 36:2018 pdf free download

ASME PTC 36:2018 pdf free download.Measurement of Industrial Noise.
The object of this Code is to describe procedures for measuring and reporting airborne sound emission from stationary sound sources and equipment, or from facilities composed of multiple stationary sound sources.
1-2 PURPOSE
The purpose of this Code is to recommend measurement procedures in a variety of acoustical environments, Including settings influenced by background or extraneous noise. Generally, an A-weighted sound-pressure level (see Section 2) is used to quantify the sound emission of industrial equipment and facilities.
1-3 SCOPE
This Code provides guidelines for the following two methods of measuring near- and far-field sound levels:
(a) Survey Method (Survey Grade). This method is used to expeditiously perform cursory measurements to assess acoustical performance of systems and equipment. This may consist of preliminary or limited measurements for further study and review, or for more in-depth follow-up work Refer to ANSI/ASA S12.56/ISO 3746.
(b) Engineering Method (Engineering Grade). This method is used to perform precise field measurements for assessing acoustical performance and compliance with acoustical requirements. These types of measurements usually include an assessment of variability in the data and of uncertainty. Refer to ANSI/ASA S 12.54/ISO 3744.
General guidance for sound-level measurements is found in Nonmandatory Appendix B.
1-4 UNCERTAINTY
There are two levels of uncertainty accuracy, engineering and survey, that are dependent on the test conditions during the measurement. These are discussed in subsection 3-3.
3-4.1 Test Objectives
The objective(s) of the test shall be defined as obtaining one or both of the following:
(a) near-field sound-pressure level
(b) far-field sound-pressure level
3-4.2 Sound Survey Report
The sound survey report shall be defined In terms of the following:
(a) acoustical instrumentation
(b) microphone locations and orientation
(c) data retrieval and archiving methods to be used, such as direct readout, data storage, and data recording
(d) data reduction required
(e) expected measurement uncertainty
(I) corrections
3-4.3 AcousticaL Environment
The acoustical environment where the equipment components are to be tested shall be defined. The following variables shall be considered:
(a) free field or reverberant field
(b) reflecting surfaces
(c) contribution of auxiliary noise sources
(d) background noise
(e) atmospheric conditions
3-4.4 Operating Conditions
Equipment components to be tested shall be operated at conditions as stipulated. A record of the operating conditions shall be maintained. The following additional parameters shall be considered:
(a) location and mounting of equipment
(b starting time of each acoustical test
(c) duration and number of tests
(d) number of times a measurement is made
fr) duration of operation at test conditions before measurements are made
(I) criteria for determining when test conditions are attained
(g) responsibility for control of operating conditions during test
3-4.5 Equipment Characteristics
Equipment to be tested shall be classified in terms of the following:
(a) size (physical dimensions); a controlled drawing, to be included in the report. may suffice
(b mode of operation
fr) installation and mobility
(d) acoustical characteristics
3-5 SOUND MEASUREMENTS
Sound surveys shall be conducted by an engineer, technician, or acoustical consultant. The person making the test shall have sufficient experience in this area to have the skills and knowledge to collect and understand the measurement data. He or she shall provide a description of his/her skills and experience, as part of the report.