This tutorial model shows how to import a 3D scanned geometry of a human head and torso and compute the head related transfer function (HRTF). The scan is imported as a stl file and converted into a COMSOL geometry.

2020年7月14日 · The agreement in results exhibited here shows that you can use COMSOL Multiphysics to compute the HRTF of an actual human head and shoulder geometry, lessening the need for tedious HRTF testing of individual subjects.

Knowing the listeners HRTF, you can simulate a sound source at any position by filtering it with the transfer function corresponding to that position. The HRTF class provides methods for manipulating, plotting, and applying head-related transfer functions. Typically the HRTF class is instantiated by loading a file.

We can plot some basic visualisation like the hrir and hrtf at specific locations. We can visualise the ITDs and ILDs of the HRTF with these functions: Here we can load in an overview of the transfer function of an HRTF at specific locations across elevations.

2022年1月27日 · Head-related transfer functions (HRTFs) describe the spatial filtering of acoustic signals by a listener’s anatomy. With the increase of computational power, HRTFs are nowadays more and more used for the spatialised headphone playback of 3D sounds, thus enabling personalised binaural audio playback.

The plot_3d_angle.m is a function allows users to plot all HRTF measurement point in three dimensional. It is similar to the SOFAplotGeometry in the original SOFA function but with more flexibility.

HRTF_path = "MRT01.sofa" HRTF = sofa.Database.open(HRTF_path) HRTF.Metadata.dump() # plot Source positions source_positions = HRTF.Source.Position.get_values(system="cartesian") plot_coordinates(source_positions, 'Source positions'); # plot Data.IR at M=5 for E=0 measurement = 5 emitter = 0 legend = [] t = np.arange(0,HRTF.Dimensions.N)*HRTF ...

2021年3月16日 · Polar plot of the left ear HRTF in the horizontal plane at approximated octave band frequencies. The actual bin frequencies are stated for better comparison with simulations.

To plot HRTF from not-SOFA format - convert it to SOFA first and then use SOFA plotting tools. For example see hesuvi_to_sofa_converter.py. Any converter script should convert from SOFA and back to SOFA to ensure compatibility with HRTF analysis and plotting tools. SOFA format supports all metadata - so it is quite robust choice.

Human Head-Related Transfer Functions describe the transmission from the free-field to the eardrums. HRTFs are measured on human subjects or on dummy-heads, characterized by the angle of incidence. The dummy-head meas-urement method allows the acquisition of data in high spatial resolution.