Nept's Journal - ASC 5g and other stuff

[Shannon]

Phone speakers are much less capable than, say, laptop speakers typically (although that may be changing). If you have it calibrated properly, it'll be detectable to some people and many children at even mid to lower volumes from a cell phone. I usually play mine from my cell phone at 11/15 volume, and I can't hear it. Andrew, however, can. My friend Mike has a girlfriend who can hear it all the way down to 7/15. At volumes of 12+ on my phone, the speaker distortion becomes noticeable to everyone around me.

Kids can hear higher pitches because they have smaller eardrums and otological structures in general, I theorize.