I hereby Post first!! under article 125 section 4 paragraph 6 ! Any glumerterians failing to claim posting first after doing thereof,so gives up that post or any claim of post thereafter on the thread thus in dispute!!
nitrous oxide (whippets, etc. ) has a similar effect but less dramatic effect on voice.
I'm not sure i buy the "filters out the high frequencies" explanation. I think its just as likely that denser molecules simply vibrate slower. The inverse property of helium has several uses in medicine.
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