The stethoscope effect is often seen in in-ear headphones for cable TV, where the ear cup wire or module is subjected to external impact or gas friction, causing vibrations to be transmitted immediately to the ear canal through the ear cup wire (the wire in the ear is usually very strong, which is beneficial for transmitting vibrations), resulting in an unpleasant friction sound.

In fact, the stethoscope effect is caused by the摇晃 and friction of the wire, and can be effectively reduced by using the following several methods in combination:

(1) Pull the phone earphone wire close to the playback software upwards, and the best way to reduce the length of the wire is to pull it closer to the ear cups, preventing excessive contact and friction. Placing the portable playback software in the chest pocket is more suitable;

(2) Let the wire run inside the clothes or pants, which is also a good way to reduce wire摇晃;

(3) Secure the terminal device with an elastic band or a metal clip, and stabilize the wire to reduce摇晃 friction;

(4) Tie a knot at the terminal device on the wire; the tighter the knot, the less noticeable the stethoscope effect.

(5) Wrapping around the ear, for ear cups like Bluetooth wireless earphones for mobile phones, this is a very good way to reduce stethoscope effect. The basic principle is to keep the wire stable when close to the terminal device of the ear cups;

(6) The back line, for all types of ear cups, involves pulling the wire up from the back, which not only stabilizes the wire against chest movement but also conceals the ear cups.