Yes, most speakers are 20Hz-20kHz or better. Here's a pair of $10 headphones that do just that[0]. Most humans have range inside that band. Those both are really the limits of human hearing and as you get older it dramatically decreases. I remember there were those ringtones (IIRC called cricket?) that used high frequencies so teachers wouldn't hear it go off. Some malls also used high frequency sounds so teens wouldn't loiter outside their stores. Most of these were even below 18kHz.
