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September 9

September 9 is the 252nd day of the year (253th in leap years). There are 113 days remaining.

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Holidays and observances

See Also:

September 8 - September 10 - August 9 - October 9 - listing of all days

January, February, March, April, May, June, July, August, September, October, November, December

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... falls roughly between 20 Hz and 20 kHz at typical amplitudes with wide variations in response curves. Above and below this range are ultrasound and infrasound, ...