Medición de Respuestas Impulsivas de Cabeza Individuales utilizando Secuencias Binarias de Golay

Abstract

A sound wave is transformed by the torso, head and ears, before reaching the eardrums of a listener. These changes are different for each ear, angle of incidence, and vary from person to person. Head-related impulse responses (HRIRs) in the time domain, or head-related transfer functions (HRTFs) in the frequency domain, characterized the transmission between a sound source and the eardrums of a subject. This paper presents a HRIR measurement system, which uses Golay codes as excitation signal. These binary sequences give good results with high background noise and create impulsive responses without the artifacts and modulations that usually incorporate sinusoidal sweeps in these conditions. Results of measurements carried out in a head and torso simulator are coherent with similar studies. Also the main features of the spectral profiles of the HRTFs, which result in cues to localize a sound source, are analyzed.