Abstract
The ASTM and ISO standards offer the test engineer several different options for measuring the average sound pressure levels in the receiving room during impact tests. The microphones can either be placed at discrete locations in the room, or can be manually or mechanically scanned in the room. The standards also define the minimum distance of the microphones from the walls as 1 m for the ASTM method and 0.5 m for the ISO method. We compared the average sound pressure levels using the discrete microphone method and manual scanning method. The variation between microphone positions was greater (up to 19 dB) when the microphones are allowed to be as close as 0.5 m from the walls. The scanning method showed the lowest variability, and for this test configuration, resulted in lower average sound levels in low frequency bands. The low-frequency corner method in the ISO standards was also investigated.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.