During the last years are appearing headphones that do not enter our ears, they work thanks to the bony conduction: directly emitting vibrations in our skull.
The vibrations are transformed into sound when they reach our inner ears directly without passing through the eardrum. A performance that has several advantages compared to traditional headphone systems.
It allows us to have our ears free and our ears exposed so we can hear what is happening around us. Useful when we need to be attentive to other events like when we run or use the bicycle in public.
By ignoring the eardrum, this small and weak organ located at the door of our auditory system, is protected from the damages caused by the sounds of our music. According to the US Department of Health, beyond 85 decibels can irreparably affect our eardrum.
The European Union has ordered manufacturers of smartphones and audio players to limit the volume on headphones, and to alert users when the volume exceeds certain maximums. The goal is to protect citizens from developing hearing problems from young people.
The third advantage is that the sound that comes through the bone conduction is more faithful, but less clear. If we hear recordings of our voice through bone conduction it will be more like how we hear it when it comes out of our mouth, avoiding that feeling of thinning when we hear our voice through a loudspeaker or helmets. The reason is simple: our words reach our ears through the bones of the skull, just like this type of speakers.
Meanwhile, the disadvantages of these headphones go through a high price that throws back many and a sound that does not reach the fidelity of the dynamic range of traditional helmets. For many, the sound is blurred, and if you have long hair in the area where they fit, can even be spectacular.
At the moment, it is professional and amateur athletes who benefit most from this technology, as they can make their long workouts much more entertaining without having to cover their ears.
They can be docked on the eyelashes of eyewear © Provided by La Vanguardia Ediciones, S.L. They can be docked on the side of the glasses
The other group who sees an improvement in their quality of life with bone conduction headphones are people with hearing problems. In severe cases, small pieces of titanium may be attached behind the ear to locate specific bone-conducting devices as a prosthetic.
These small pieces of metal, just a few millimeters, can transmit much more reliably the sounds to the cranial base, and therefore ensure greater clarity in words and different waves emitted.