July 4th – Celebrate Safely

The Fourth of July and fireworks are traditional in the US, and go together like hamburgers and hot dogs. And, as thrilling as it is to watch fireworks, care should be exercised because the sound pressures generated by fireworks can lead to hearing damage if proper precautions are not employed.   Short History Ancient China…

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Sound Quantification II

This post continues a series on the origins  of initial sound quantification.  Last week’s post related to how the speed of sound was measured.  This week continues with frequency analysis and amplitude. Frequency Analysis of Sound The Italian scientist Galileo (1564-1642) pulled a knife blade across the serrated edge of a coin and noted the…

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