Older generations will surely
remember those heavy headphones with the cord so curled and so short that it
made it almost impossible to listen to music at a distance greater
than 2 meters.
Although for several years now
it is possible to have models of headphones that are much
lighter and more comfortable to use, with cables with the indicated length to
be able to enjoy our discs pleasantly , the
truth is that a technology that exceeds any experiences we may have had.
It is the
use of wireless technology applied to the transmission of sound. These
new models of headphones incorporate, depending on the manufacturer and the use
for which the headset was designed, Bluetooth, Infrared or radio
frequency systems .
Although in the
current market there are headphones with different types of transmission
technology, infrared is usually one of the most used in small and
closed environments, given the short radius of action of its
signal.
Here are some
details about the characteristics of the various types of
wireless headphones.
Infrared headphones
This
type of transmission provides certain advantages such as its
relative low cost with respect to other technologies , but
the truth is that it also offers many disadvantages, among which is the range,
which is only around six meters, which is also closely
linked to the fidelity of the sound when we move
away from the transmitter base, that is to say that the further we get
from the point of signal emission, the more probabilities of obtaining loss of
sound exist. Another point to highlight is the
need for both devices, transmitter and receiver, to be
in the same line of sight to make the link.
Radio Frequency Headphones
These
types of headphones are the most widespread on the market for hi-fi
applications, in addition to providing excellent qualities in the effective transmission
range, since they can transmit up to almost 100
meters away in a 360-degree arc.
Radio waves are
capable of passing through walls and ceilings, and added to their long
range, makes headphones equipped with this
technology an excellent choice for those users with large environments, since
it also offers the possibility of being used in the Exterior.
However, there are certain
disadvantages, since we bear in mind that RF technology
can pick up interference from radio waves of the same frequency band emitted
by wireless devices, wireless networks or electric fields, producing
static and hum.
Bluetooth
headphones
As
we know, the Bluetooth technology is
used for intercommunication between various types of devices, and
some manufacturers have decided to use this kind of technique to
incorporate it into their headset models for quality and transmission
speed.
The system is
capable of transmitting large amounts of data at high speed, but on the other
hand, it offers a limited range, which is around 10 meters , but
still extremely suitable for use when we use them near the transmitter base,
PC, Home Theater or TV.
Sound transmission using
Bluetooth technology poses certain disadvantages associated
with interference or pickup distance.
First
of all, and as in infrared technology, the sound quality loses fidelity
if we move away, being also very sensitive to
external interference.
In the aspect that has to do with
interferences, it has developed a method based on the RF
transmission system called Kleer , which
achieves that the level of quality of emission and reception of the audio
signal is clean, clear and free of interferences , thus achieving
a sound quality close to that provided by an audio CD.
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