The highest frequency at which device produces audio. The higher the high-frequency response, the clearer and crispier the treble.
2.Significantly lower low-frequency
vs 38Hz (the average)
vs 1Hz (best: Sony MH1CBLK)
The lowest frequency at which the device produces audio. The lower the low-frequency response, the stronger and juicier the bass.
3.Has sound isolation / passive noise reduction
vs No (51% don't have it)
The device sits tightly in place, creating an acoustic seal which reduces background noise and prevents your music from leaking out.
4.Has an on-ear form
vs No (78% don't have it)
This device comfortably rests on top of your outer ears. As it doesn't block out everything from the outside world, it's preferred in places like office environments and recommended for outdoor activities.