This possibility is due to vibrotactile stimulation, where the sound picked up by the microphone is transmitted to the skin, in the areas rich in receptors, in the form of vibration, using electromagnetic transducers in such a way as to communicate a limited amount of information suitable for reconstructing the message.

The purposes of this aid are:

• to improve the performance of the classical hearing-aid solution in case of total hypoacusis, facilitating the discrimination of words
• to perceive sounds and background noise, avoiding sound isolation
• to increase perception and autocontrol of speech; to facilitate recognizing certain characteristics of speech, such as rhythm, duration, accent and sonority.