Tip 3: How the headphones are arranged
Devices for sound reproduction were originally primitive electromagnetic telephones. The creation of the first phone is traditionally attributed to Alexander Graham Bell, who in 1876 patented a device for transmitting sound, the principle of which formed the basis for the design of headphones.
Headphones, phones and more
In fact, all the headphones are arranged in the same way, if some differences exist, they are most likely associated with the elements of the device and the materials used, but not with the design scheme.
Thus, any earphone is arranged, as well as all ingenious, rather simply. First of all, it is a certain case in which an electromagnetic device is fixed, consisting of a coil, a flexible membrane and a permanent magnet.
The coil is usually a certain frame, which is fixed on a flexible membrane. The frame has a winding of thin copper wire, and the resistance of this winding must meet a certain standard.It should be between 20 - 120 ohms. Recently, the world is planning a transition to a standard of 50 - 600 ohms.
An alternating voltage from a source of sound vibrations is supplied to the terminals of this coil.
A permanent magnet is located inside the coil, and a guaranteed gap is provided between it and the coil itself, which allows the coil to move freely along the axis. When a coil signal arrives at an alternating voltage modulated by the frequency of sound vibrations, a corresponding alternating magnetic field is induced in the coil, which, in turn, interacting with the permanent magnetic field of the magnet, causes the membrane to oscillate, since the latter is rigidly fixed to the coil frame.
Headphones are not so simple
Thus, almost all headphones for phones are arranged, but at this stage other differences begin. And they are quite substantial. So, for example, the quality of sound is influenced by the purity of the copper from which the wires are made, the quality of the soldering of the contacts, and the presence of gilding on the contact pairs, and if we talk about the symmetry of the headphones, in the top models they are calibrated and selected almost manually than and due to the extremely high price.
Headband manufacturers are also attracted by the headband brace. This seemingly uncomplicated device undergoes constant variable loads, besides it should provide optimal coverage and the necessary, and at the same time, comfortable compression.
Individual words deserve special headphones for computer games, which today are equipped with three speakers for each channel, have a subwoofer simulator and transmit sound through the front, rear and side channels.
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