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Design & Implementation of an Acoustical System for a Multi-Purpose Auditorium/Dining Facility

A client with an assisted living complex was experiencing noise reverberations in their grand room and fitness center spaces, rendering speech and music unintelligible. The grand room is used for dining events, musical performances, and guest speakers. Acoustical Systems was contacted to help correct this problem. We first performed a noise study, testing the reverberation time (RT60) of the sounds in the space and defining the acoustical properties of the space. Our test results as well as recommendations on how to reduce the echoes in the area were summarized in a thorough acoustical engineering report, which included our recommendations on how much acoustical material would be necessary for correction, and possible locations for material placement.

Acoustical Properties of Grand Room Reverberation Time When
Poor listening and communication condition 1.50 seconds Before panels
Ideal listening condition .89 seconds After panels

The RT60 testing measured the starting conditions of the space at 1.50 seconds, which are "poor" listening conditions with little acoustical absorption. The design goal was set at an rt60 of 1.0 second or less. According to our calculations, the 52,500 cubic foot space needed 680.6 sabins of acoustical absorption treatment added in order to meet the client's needs. We then designed and fabricated the acoustical panels necessary to bring the space to ideal communication and listening conditions. We were able to procure the necessary materials, taking into consideration the architectural and interior design elements of the finished product. After construction and installation, we provided testing to verify proper sound absorption/diffusion performance. After treatment, the new rt60 value measured at 0.89 second, exceeding our original design goal.

Below are photographs showing the Grand Room before and after acoustical panels were installed:

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Grand Room Before Acoustical Panels
Before
Grand Room Before Acoustical Panels
 

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Grand Room Before Acoustical Panels
Before
Grand Room Before Acoustical Panels
 

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Grand Room After Acoustical Panels
After
Grand Room After Acoustical Panels
 

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Grand Room After Acoustical Panels
After
Grand Room After Acoustical Panels
 

The turnaround time for this project was 6 weeks, delivered and installed in Dayton, Ohio. A project of this nature is applicable to a wide range of venues including religious facilities, educational facilities (gyms, auditoriums, classrooms), music venues, and professional settings such as medical offices and conference rooms. We welcome the chance to design and build custom noise solutions at cost effective rates. For more details about this project, please see the table below or contact us directly for information about our services.

Acoustical System Project Highlights

Project Name Multi-Purpose Room Acoustics Project
Project Objective The objective of this project was to furnish acoustical engineering services to measure the acoustical properties of the room, make recommendation on how to reduce the reflected sound as well as improve speech/music intelligibility, and to provide and install all of the necessary acoustical materials.
Capabilities Applied/Processes Primary:
  • Noise Assessment – Reverberation Time (RT60) Testing
  • Acoustical Engineering Study
  • Engineering/Design
  • Material Procurement and System Fabrication
  • System Installation
  • Post-Installation Performance Verification
Material/Equipment Used Acoustical Absorption Panels with custom shapes and architectural finish.
Overall Dimensions Room Volume: 50’ Length x 50’ Width x 21’ Height
  • 52,500 cubic feet
Project Requirements rt60 (Reverberation Time) value of 1.0 seconds or less
In process testing/inspection performed Incremental rt60 testing during installation of absorption panels
Before & After Results Before
Maximum Average rt60 = 1.50 second
Center of the room – No acoustical absorption

Acoustical Design Goal
Maximum Average rt60 < 1.0 seconds

After
Maximum Average rt60 = 0.89 second
Center of Room – With acoustical absorption
Industry for Use Education (Classrooms, Auditoriums, Gymnasiums), Religious Facilities, Music Venues, Medical, Professional (Conference Rooms, Offices)
Delivery/Turnaround Time 6 weeks
Delivery Location Dayton, Ohio
Standards Met Customer Specifications

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