There's no question, wireless headphones are convenient to use. Gone is the bundle of crumpled wires, no need to connect to a signal source. It is now possible to move freely for dozens of meters. Travellers, sportsmen, drivers, people of individual professions appreciated the absence of movement, the possibility of using both hands. With all the positive properties of the wireless design, there is a slight difficulty in use - the need to recharge.
A little bit about the wireless device
The principle of operation of wireless headphones is based on the conversion of the signal received through:
- Bluetooth connection. The analog signal is processed into a digital signal. A stable connection is maintained at a distance of up to 10 meters. The presence of building partitions or furniture are not an obstacle to the signal.
- Infrared port. Audio communication is based on optical signal transmission in the infrared range. Features a high quality of transmitted audio information, including music. Communication is resistant to electromagnetic interference. A significant disadvantage - the transmitter and receiver must be in direct line of sight: furniture will not only distort the signal, but can completely stop the connection. An analogue of such a device is a remote control.
- Radio wave communication. The audio signal is reproduced from spatial electromagnetic radiation, - radio waves. Stable reception zone within 100~200 meters. Sound quality can be affected by extraneous noise.
Wireless headphones work with any transmitter equipped with the appropriate mechanism: computer, phone (smartphone), TV and other devices.
The portable design necessarily includes a power source, either a battery or a rechargeable battery. The first option is rarely used, due to its disposability. But as a temporary way out, it is well used when replacing the battery. The latter is a reusable device, but needs to be periodically recharged.
Types
Wireless headphones are subdivided according to the method of signal transmission:
- Radio earpiece. The first type of wireless audio playback. The most "long-range" device. The distance of stable reception is up to 100~150 meters. Increasing the range, - moving away from the transmitter, will cause deterioration of sound.
- Infrared design. Receives the signal in the optical infrared range. Headphones are distinguished by their sound quality. Resistant to interference from electromagnetic radiation. Minus - the line of sight must be maintained.
- Bluetooth system. Popular audio transmission and playback system. The signal is not affected by visible obstacles and radio interference. Limited range of reception, up to 10 meters. Use with a computer, tablet, player, cell phone.
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Charging the headphones
Despite their small size and seeming simplicity, wireless design imposes a number of requirements for long-lasting and stable operation:
- Avoid drops to avoid mechanical damage.
- Store in a dry place at normal temperature.
- Timely and proper charging.
The power source, the battery, depends on a number of parameters:
- Charging time.
- Degree of discharge before the recharging process.
- The design of the charging wire.
- The method of recharging, - from an electric stationary network, personal computer, car.
Duration of charging.
The process of charging the battery does not exceed 3 hours. The type of power supply and recharging time are reflected in the instruction manual of the headphones. The manufacturer also specifies the degree of discharge from which recharge is required. Determined by the type of battery, its properties.
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Charge level
Wireless headphone models are equipped with light indicators that signal the status of the power source. The number of visual lights varies and ranges from 2 to 5 pieces. The colors of the lights are white, red, blue, green and yellow. Gamma is determined by the model of headphones.
Mode of operation: off, steady light or flashing. The last parameter is determined by the program in the control unit of the charge. The meaning of the signals is deciphered in the accompanying documentation for the product.
A decrease in capacitive charge will cause a decrease in sound volume, the signal quality will deteriorate. Most manufacturers recommend discharging the battery completely. This improves the physical and chemical charging process. You can fully discharge the battery by leaving the headphones on. The time of energy depletion will be indicated by a certain indicator light.
Power cord
Wireless headphones are delivered with a power cord for connecting to a power source. The headphone charger and cable are fully adapted to each other's electrical parameters. The use of a third-party wire can cause a discrepancy in resistance, a breach of contact.
The result - abnormal charging mode, the battery receives little power. The internal structure of the power supply is disturbed. This affects the quality of the sound signal, leads to premature discharge and battery failure.
External power source
The headphone charger is adapted to a fixed power grid and designs with a USB connector, such as a computer or a car. If the latter does not have a connector, you will need to purchase a special adapter.
Wireless headset, at the time of charging should not be overloaded. It will cause abnormal operation and overheating of the device.
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