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Sound Ideas is a comprehensive program designed for Acoustical Noise Reduction solutions in areas such as gymnasiums, swimming pools, cafetoriums, multipurpose, music rooms, and other areas where excessive noise is detrimental to the reasonable use of the facility. In recent years, guidelines have been suggested by ANSI,12.60, ADA and other code bodies. In fact excessive noise in these types of areas has been the subject of several lawsuits.

Sound Ideas was designed for use by both the public and private entities using public bid procedures to achieve an economical solution to acoustical noise problems. The value is that there are no design costs and no commitment by the owner until bids for remedial work are accepted.

The Sound Ideas program is a performance based method of product delivery which allows the facility owner the flexibility to solve acoustical reverberation issues without the capital outlay for up-front design services. This contract delivery method provides the owner with complete control of the process and allows for innovation and competition to keep prices low while not limiting products or manufacturers.

Simply put, once it has been determined what is required in terms of acoustical material and its most beneficial placement, it is up to the bidder to provide the necessary Sabins* of Sound Absorption to reduce the reverberation time of the treated space to the optimum level.

* Named after Wallace C. Sabin, acknowledged founder of modern architectural acousticse Acoustical Treatment is bid on the basis of furnishing the Sabins of sound absorption necessary to reduce the reverberation time to the desired level for the space.

Program Outline

1. Contact CMA, Inc. or your local CMA Representative from the CMA web site to arrange a free, no obligation survey of the proposed areas to be treated.

2. The CMA Rep, who is well trained in the science of architectural acoustics will visit the site or look at any documents that may be transmitted to determine:

A. Type of Space (i.e., Gym)
B. Size and Volume of Space
C. Materials presently used or proposed for the space such as wood floors, steel deck, CMU walls, etc.

3. From this data, and other information such as how the space is used (2 classes at one time, etc.) CMA can determine the existing reverberation time of the space. Reverberation is simply the time after the noise source has ceased, that the sound is still heard (echo).

4. The Acoustical Analysis is based on methods of determining reverberation time developed by Wallace Sabin and called Sabin Formula. With the number of Sabins determined for a space, accurate proposals can be developed for evaluation through the bid and procurement process.

5. The owner can solicit material only pricing including freight for installation by his own forces. CMA Acoustical Systems will provide installation instructions, and placing diagrams, including anticipated acoustical performance in the completed area.

6. The project can be competitively bid to the owner as an installed product. At this point, CMA Acoustical Systems will assemble a team of qualified contractor(s), Engineers to design materials and placement that are suitable to the treated space, references, performance data, drawings, and pictures of the areas to be treated.

7. The Acoustical Treatment is bid on the basis of furnishing the Sabins of sound absorption necessary to reduce the reverberation time to the desired level for the space.

8. The bid(s) will include the necessary documents listed in #6 above and the expectation of performance, design documents, and bid bond if required.

9. The owner has the privilege of accepting the qualified bidder after study of the various proposals or rejecting all the bids. All choices are by the Client.

10. The uniqueness of this method is that there may and usually are several materials of various suitability to a space with different degrees of acoustical qualities and labor to install. Bids are for these approved materials based upon the amount of sound absorption required.

For example, Material A and B are both suitable for installation in a swimming pool, and are both acceptable in appearance to the client. The pool requires 1000 Sabins of absorption to reduce the existing reverberation time to 2.0 seconds.

Material A has a absorption of .75 Sabins at 500hz, while Material B has an absorption of 1.00 Sabins at 500hz as well. Therefore to meet the sound criteria 1,334 sq.ft. of Material A would have to be installed while only 1,000 sq. ft of Material B would be installed to achieve the same desired acoustical results.


The problem is noise. The solution is CMA.



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CMA, Inc., 19 Stonehill Rd, Oswego, IL 60543
Toll Free: 866.730.9750 Tel: 630.551.3100 Fax: 630.551.3106