Abstract
Head-related impulse responses (HRIRs) allow for the creation of virtual acoustic scenes. Since in ideal conditions the human auditory system can localize sounds with a very high degree of accuracy, it is useful to have an HRIR database with high spatial resolution, such that realistic-sounding scenes can be created. In this article, we present an HRIR database with 12722 directions, giving a spatial resolution of 2 arc degree or better, for a sphere covering − 64∘ elevation to the zenith. Four sets of HRIRs were recorded with different head-and-torso simulators (HATSs), including one with a six-channel bilateral behind-the-ear hearing aid model. The resulting database is available at https://www.uni-oldenburg.de/akustik/mmhr-hrtfand is distributed under a Creative Commons license.
Highlights
Humans are very good at localizing sounds relative to their heads
Our database differs by having several head-and-torso simulator (HATS) measured using the same setup at high spatial resolution and coverage and includes one HATS fitted with a hearing aid, allowing for comparative studies
4 Conclusion The MMHR-Head-related impulse response (HRIR) database introduced here is a set of binaural and bilateral hearing aid impulse responses recorded using a set of four different HATSs
Summary
Humans are very good at localizing sounds relative to their heads. The human brain can localize sounds by taking advantage of the way sound is modified on its path from the source to the ears, especially how sound is modified differently between one ear and the other.These differences in sound between the ears give rise to binaural cues such as the interaural time difference (ITD) and interaural level difference (ILD). These are referred to as head-related impulse responses (HRIRs) in time domain or headrelated transfer functions (HRTF) in frequency domain. Besides measuring HRIR at the entrance of the ear canal, sets of impulse responses were measured for microphones of a hearing aid attached to a manikin.
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