Virtual acoustic presentation uses convolved room impulse responses with headphone inverse filtering

Evidence

For virtual presentation, the stimuli were convolved with binaural room impulse responses (BRIRs) recorded from a manikin (B&K HATS 4100) sitting in the listeners’ position and wearing the lightweight headphones with the loudspeaker 1 m to the right in a standard office room with minimal furnishing (reverberation time, RT60 = 650 ms). Impulse responses were also recorded from the headphones and used to derive inverse filters to compensate for the headphone-to-microphone frequency response. Sound levels for the different stimuli were equalised at the right ear of the manikin and, for the reference stimuli, were equivalent to 57 dB(A) as measured at the head position with a hand-held sound-level meter. — Dijk, Pim van, Physiology, Psychoacoustics and…, 1532

Categorization

• DEFINE: Clarifies the technique: convolving with manikin-recorded binaural impulse responses plus inverse filters to flatten headphone response.