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Principles and Applications

ACOUSTICAL USES FOR PERFORATED METALS: Principles and Applications by Theodore J. Schultz, ACOUSTICAL USES FOR PERFORATED METALS Table of Contents PART ONE: THE Principles I. Introduction A. How Perforated Metals are Used in Acoustical Applications 1. As a Facing for Something Else 2. In Tuned Resonators 3. As Airflow Diffusers B. Noise Control with Sound Absorptive Treatments Using Perforated Metals II. Matching the Sound Absorption to the Frequencies Where the Noise Problem Lies A. Frequency Analysis B. Sound Level meter C. Frequency Spectrum D. Frequency Spectra for Some Household Equipment III. The Transparency Approach A. Perforated Metal Sheet with High Transparency for Use in Broad-band Sound Absorptive Treatments B. Why Perforated Metals Are Often the Best Choice C. Sound Transparency of Perforated Metal IV. The Tuned Resonator Absorber Approach A. Perforated Metal Sheet with Properties Chosen to Target a Limited Range of Frequencies for Optimum Sound Absorption B.

ACOUSTICAL USES FOR PERFORATED METALS: Principles and Applications by Theodore J. Schultz, Ph.D.

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