Just how do wireless headphones work? Wireless know-how frees us from the binding constraint of ever-tangling cords and lets us enjoy our favourite music without the fear of the headphones being yanked unexpectedly from our ears if they catch the cord on something else. But how does the sound reach our ears without a cord, and which wireless headphone know-how is best?
The Base Unit
Regular headphones work when electric impulses are sent from an electronic tool, such as an MP3 player, to the headphones through the wire. Wireless headphones circumvent this connection by sending a signal through the air to the headphones. However, they need a base unit which is plugged directly in to the audio tool to transmit the signal.
Radio, Infrared And Bluetooth Signals
One time the base unit is plugged in to a tool like an MP3 player, it sends a signal to the headphones. This signal comes in three different forms: radio, infrared or Bluetooth. Radio transmitters work like any radio works. The headphones receive the radio waves through an antenna and covert them in to sound. Infrared headphones work more like a TV remote. The sound is carried through an optical signal and converted in to sound. Bluetooth headphones work much like radio transmitters, but they use a low frequency to encode digital knowledge that is then converted to sound.
Pros And Cons
Each form comes with its own downsides. In order for infrared to be effective, you must maintain a clear line of sight between the transmitter and the wireless headphones. This limitation is not useful to the wanderer, but infrared does work well for TV headsets. Radio and Bluetooth don't need a clear line of sight. However, radio can sometimes pick up interference from other devices. Usually radio headphones come with a few channels to keep away from this. Finally, Bluetooth has a more limited range than radio, but it offers less interference.
The Base Unit
Regular headphones work when electric impulses are sent from an electronic tool, such as an MP3 player, to the headphones through the wire. Wireless headphones circumvent this connection by sending a signal through the air to the headphones. However, they need a base unit which is plugged directly in to the audio tool to transmit the signal.
Radio, Infrared And Bluetooth Signals
One time the base unit is plugged in to a tool like an MP3 player, it sends a signal to the headphones. This signal comes in three different forms: radio, infrared or Bluetooth. Radio transmitters work like any radio works. The headphones receive the radio waves through an antenna and covert them in to sound. Infrared headphones work more like a TV remote. The sound is carried through an optical signal and converted in to sound. Bluetooth headphones work much like radio transmitters, but they use a low frequency to encode digital knowledge that is then converted to sound.
Pros And Cons
Each form comes with its own downsides. In order for infrared to be effective, you must maintain a clear line of sight between the transmitter and the wireless headphones. This limitation is not useful to the wanderer, but infrared does work well for TV headsets. Radio and Bluetooth don't need a clear line of sight. However, radio can sometimes pick up interference from other devices. Usually radio headphones come with a few channels to keep away from this. Finally, Bluetooth has a more limited range than radio, but it offers less interference.
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