The Firing Line Forums - View Single Post - HD etc noise issue 9x19mm, .45 and .357 vs .223

Para Bellum · January 17, 2006, 04:55 PM

I recently happened to be examined by an otologist (ear specialist) who also served in the Army and did extensive ballistic testing.

He said that the difference between .223 noise and 9x19mm noise is in the mircoseconds area where most tests (milliseconds) can't reach. He meant that the .223 does way more damage and is much louder but for such a short time that most devices can't record the difference. In his opinion the key to ear-damage is bullet speed. Anything above 880 meters/second were critical.

OK. Protection for indoor-shooting with my .223....

January 17, 2006, 04:55 PM	#24
Para Bellum Senior Member Join Date: January 7, 2005 Location: right there Posts: 1,882	News from the otologist (ear specialist) on the .223 noise compared to 9x19mm I recently happened to be examined by an otologist (ear specialist) who also served in the Army and did extensive ballistic testing. He said that the difference between .223 noise and 9x19mm noise is in the mircoseconds area where most tests (milliseconds) can't reach. He meant that the .223 does way more damage and is much louder but for such a short time that most devices can't record the difference. In his opinion the key to ear-damage is bullet speed. Anything above 880 meters/second were critical. OK. Protection for indoor-shooting with my .223.... __________________ Si vis pacem - para bellum If you want peace - prepare for war