Test of the diapaso: The instrument vibrating is tested alternatingly in the two ears, for obliteration of one of them. The diapaso goes being moved away until the patient indicates that more she does not hear. Test of orelhinha: One has tested simple 48 hours done after the birth of the baby can detect if it has some auditory problem and to prevent problems in speaks and the learning of the child. The evaluation is fast, painless and important for all the life of the person. The examination is made in the nursery in natural sleep, of preference in 2 or 3 day of life Delay of 5 the 10 minutes, does not have any contraindication, it does not wake up nor bothers the baby it does not demand no type of invasive intervention (use of needles or any armor-piercing object) and is absolutely in-cuo.

The auditory selection is initially made through the examination of Emissions evoked acoustics (code 51.01.039-9 AMB). Generally after the diagnosis of conduction deafness, to patient is indicated removel of hindrance of the auditory pavilion, and in the cases most serious, the nervous deafness, use of auditory devices is indicated, being that it has exceptions that does not have as to treat. ECOLOCALIZAO DURN (2008, p.239) describes the ecolocalizao as an auto-information system, in which exactly animal one possesss an emitting agency and another receiver respectively to emit and to receive the signals, that can be the echo of the emitted signal. These animals have the capacity to catch the signal reflected for an obstacle, and thus to evaluate in the distance of the same. Figure 6 and 7 shows this characteristic. Still in accordance with DURN, the main characteristics of these animals are: Evolved mechanism to generate sounds (bats, cetceos and birds); Great space extension for its activities (swimming and flying); They consume its daily activity in more or less complete blackout.