Exploring the limits of virtual source localization with amplitude panning on a flat panel with actuator array:...

Area of Science:

• Acoustics
• Psychoacoustics
• Loudspeaker Technology

Background:

• Flat-panel loudspeakers are a promising alternative to traditional coaxial systems for spatial audio.
• They offer advantages like low-visual profiles and diffuse sound radiation.
• Previous research explored their sound quality and applications in 3D sound reproduction.

Purpose of the Study:

• To investigate the spatial sound perception of flat-panel loudspeakers.
• Specifically, to quantify the localization mismatch using amplitude panning.
• To establish a benchmark for virtual source localization accuracy.

Main Methods:

• Subjective listening tests were conducted in an anechoic chamber.
• Twenty-four subjects participated in the study.
• Localization accuracy was assessed using amplitude panning techniques.

Main Results:

• The mean azimuth direction mismatch was within ±6.0°.
• The mean elevation mismatch was within ±10.0°.
• Virtual sources created by amplitude panning demonstrated high localization accuracy.

Conclusions:

• Flat-panel loudspeakers with amplitude panning can achieve accurate spatial localization.
• This accuracy approaches that of real sound sources.
• The findings provide a benchmark for future research and algorithm optimization in spatial audio.