Errors' limits of the acoustic expertise

الملخص EN

This study is concentrated on a very delicate subject, the one which concerns the acoustic expertise as a judicial proof.

This type of expertise is based on the "voice print" examination.

This term is subtly und as it relates to other types of "truces'' which have a very different meaning.

When this voice print is spectrographically studied, it is observed that, intuitively, the highest tones will have a major activity of the high frequencies oscillations.