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Head-Related Transfer Function Selection Using Neural Networks

Yao S.-N., Collins T., Liang C.

Archives of Acoustics

2017

Vol. 42, No. 3

365--373

In binaural audio systems, for an optimal virtual acoustic space a set of head-related transfer functions (HRTFs) should be used that closely matches the listener’s ones. This study aims to select the most appropriate HRTF dataset from a large database for users without the need for extensive listening tests. Currently, there is no way to reliably reduce the number of datasets to a smaller, more manageable number without risking discarding potentially good matches. A neural network that estimates the appropriateness of HRTF datasets based on input vectors of anthropometric measurements is proposed. The shapes and sizes of listeners’ heads and pinnas were measured using digital photography; the measured anthropometric parameters form the feature vectors used by the neural network. A graphical user interface (GUI) was developed for participants to listen to music transformed using different HRTFs and to evaluate the fitness of each HRTF dataset. The listening scores recorded were the target outputs used to train the neural networks. The aim was to learn a mapping between anthropometric parameters and listener’s perception scores. Experimental validations were performed on 30 subjects. It is demonstrated that the proposed system produces a much more reliable HRTF selection than previously used methods.

Dependence of the head-related transfer function on pinna flare angle

Plaskota P., Dobrucki A. B.

Elektronika : konstrukcje, technologie, zastosowania

2009

Vol. 50, nr 3

19-21

Head Related Transfer-Function (HRTF) describes the modification of the spectrum of acoustic wave arriving to the ear. The HRTF influences sound source localization by auditory system. It has been proved that individual properties strongly influence HRTF. Application of HRTF which is different for each individual decreases the ability of sound source localization by the listener during headphones sound projection. The aim of the paper is the study of influence of pinna flare angle on the HRTF shape.

Funkcja Transmitancji Odniesiona dp Głowy (HRTF) opisuje modyfikację widma fali akustycznej docierającej do ucha. HRTF wpływa na lokalizację źródła dżwięku przez system słuchowy. Zostało udowodnione, że cechy osobnicze silnie wpływają, na HRTF. Zastosowanie HRTF, które jest różne dla każdego słuchacza powoduje pogorszenie zdolności lokalizacji źródła dźwięku podczas odsłuchu przez słuchawki. Celem pracy jest zbadanie wpływu kąta odchylenia małżowiny usznej na przebieg HRTF.