Over-Ear (cover the ear completely), on-ear (pressed against the ear), in-ear (inserted into the ear canal) or earbuds (inserted into the auricle, but not inserted into the ear canal).
Bluetooth is a short-range wireless technology that allows you to connect headphones or portable speakers, a stereo system or a soundbar to your smartphone or laptop. For a certain version to work, both devices must support it. The versions differ in data transfer speed, power consumption, securing data transfer, anti-interference ability and range of connection.
To take advantage of a particular codec it must be supported by both devices
Control by touches
ANC is used to reduce the external noise while listening
Technology of increasing the standard USB voltage and current to speed up battery charging
Most of the headphones are dynamic but there are electrostatic, isodynamic, etc.
Open (with no insulation) or closed (passive noise insulation) or semi-open (intermediate version). Open headphones sound more airy and provide a wide stage, closed ones provide noise isolation and amplify low frequencies.
The opportunity to disconnect the standard headphone cable makes it possible to experiment with different wires.
A cable for a balanced (symmetrical) connection allows you to neutralize the negative impact of cable length on signal transmission, and also has a beneficial effect on the final sound.
It allows you to fold the headphones so that they take less space in your bag
Brand: Apple
Headphone type: wireless
The lowest frequency, Hz: 20