Acoustical design of the Maxxon acoustical laboratory

Abstract

This presentation will discuss the acoustical design of the ASTM E492 and ASTM E90 sound testing laboratory for Maxxon, Inc. which was recently completed in Hamel, MN. The primary goal of the project was to create a world-class laboratory that would be able to test floor-ceiling assemblies with STC and IIC ratings as high as 80, with qualified measurements extending from 63 to 10 000 Hz. The presentation will show the results of pre-design site noise and ground vibration measurements as well as techniques that were used for environmental noise control. Reverberation room design and vibration isolation details that were employed to reduce ground-borne vibrations and control flanking will also be discussed. The presentation will also address the design, testing, and installation of low frequency sound absorption panels that were attached to the walls to control excess reverberation at low frequencies. Separate follow-up presentations will discuss the facility construction and the acoustical performance of the completed facility based on preliminary commissioning tests.