Introduction: Binaural Interaction (BI) allows the introduction of auditory information (in the brain as a function of differences in perception of intensity or time of acoustic stimuli). Allows you to assess the action and integrated co- operative of the brainstem in lower understanding. As the maturation of the central nervous system occurs in the craniocaudal direction, the response to this ability may change during the course of development. Objectives: To normalize and compare the development with increasing age of response in the binaural diffusion test (BPT) with digital low-pass (LP) and high-pass (HP) filters in normative listeners. Methods: Prospective, cross-sectional and observational study. A total of 120 years were evaluated, in different age groups (6 to 8 years old, 10 to 12 years old, 14 to 16 years old and 20 to 30 years old) with TFB, filter at Fc 500/1700 Hz digital Finite Impulse Response type order 4096, with null phase and 5000 between 18 and 30 years with unfiltered speech material. Results: a progressive improvement in performance with increasing age (ANOVA (one-way): p<0.0001). There was a significant difference between the filtered words, age and the unfiltered p < (Dunnet: any filtered words,01). The difference between the age groups was significant (Tukey: p<0.01), less for the results obtained in the age groups of 6-8 and 10-12 years and of 14-16 and 18- 30 years. Discussion: IB is a skill that evolves with age development and NC fabrication. Final considerations: The interpretation of the TFB should take into account the performance by age group of the patients. This is important for future applications of these tests in people with Auditory Processing Disorder.
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