MID Design Catalogs

An MID design catalog originally compiled by Peitz has been enlarged in the interim. It contains various MID solution alternatives for mechanical and electronic functions. 

FIGURE 8.12 Expanded MID design catalog by analogy with Peitz 

The alternatives are presented in the form of illustrative pictograms. The ready reference part of the catalog contains detailed descriptions of the individual solutions. 

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The contents of each MID feature are stated clearly and unequivocally in a profile. The elements that make up the profile are description, design, MID functions, and process-specific requirements. Essential aspects of the feature are summarized briefly in the description. Small pictograms illustrate the design of the feature. The MID function element refers to the developed MID design catalog, so it points to electronic and mechanical product functions implementable to a qualified extent with the feature. The process-specific requirements deal with issues that have to be taken into account in engineering implementation of the feature. The development of new features is currently a subject of research the feature used here byway of example is alignment. ... 

A wide variety of dissipative and reactive mufflers are available as predesigned catalog items from many manufacturers. Simple dissipative and reactive mufflers will typically attenuate low-frequency noise by approximately 3 to 6 dB and mid-frequency noise by approximately 10 to 30 dB. Such mufflers are often well suited for common or simple noise control applications without special requirements. Many muffler manufacturers have simple computer programs available to help with the selection of such silencers. When significantly greater noise attenuation is needed, for complex installations or critical apphcations where low noise levels are required, and when low pressure loss is necessary, it is suggested that an experienced professional be consulted to advise in the design, specification, and selection of appropriate mufflers for the specific apphcation. 

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