Educational Resources

ANSI Standard on Classroom Acoustics

The American National Standards Institute addresses classroom acoustics in a series of standards ANSI S12.60 Parts 1 and 2 and three associated booklet which are for free to interested professionals. Go here for information

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Tinnitus Simulation

Dr. Billy Martin of the Oregon Hearing Research Center at Oregon Health & Science University has recently given NHCA permission to publish an audio simulation which mimics what tinnitus (ringing in the ears) sounds like to someone who suffers from this condition. The file is free to download, but please provide credit to Dr. Martin if you use the file for training or demonstration purposes.

Noise Navigator Spreadsheet

Welcome to the Noise Navigator spreadsheet of sound levels for more than 1700 occupational, recreational, and military noise sources. The data are compiled from references in the literature and from our own measurements. For each source the reference is listed, and as available additional notes are provided. When the primary reference cites sources for its data, those too are listed. View the Noise Navigator Spreadsheet. We are interested in refining and expanding this resource. If the reader has suggestions for improvement, or documented sound levels that they wish to share, or finds any items requiring explanation or correction, please contact Elliott Berger.

Decibel Volume Levels

Here are some interesting numbers, collected from a variety of sources, that help one to understand the volume levels of various sources and how they can affect our hearing. View document