
Learn more: High bitrate audio is overkill: CD quality is still greatĮven if you could perceive those high and low frequencies, there wouldn’t be much to hear, because that’s not where our music lives and not what standard recording equipment registers. Meanwhile, only a few unusual (and likely, young) people can hear sounds above 20kHz-think dog whistle frequencies. Indeed, some people can “feel” those sub 20Hz low frequency and infrasound bass frequencies even if their ears and brain can’t interpret them. Some of us like the extended response because we think we can perceive it. While that number looks impressive, the vast majority of people can’t hear above or below the 20Hz to 20kHz range. The IE 900 frequency response ranges from 5Hz to 48kHz. This works but can get in the way sometimes.


Like other models in the IE lineup, the IE 900 is designed to go over your ears and down behind you.
