Controlling a distance from linear loudspeaker arrays to a listening point by using tangent line method

Area of Science:

• Acoustics
• Signal Processing
• Personal Audio Systems

Background:

• Confining acoustic fields is crucial for effective personal audio.
• Existing methods like acoustic contrast control (ACC) have limitations.

Purpose of the Study:

• To propose and evaluate a novel tangent line method (TLM) for acoustic field confinement.
• To compare the performance of TLM with ACC for personal audio applications.

Main Methods:

• The tangent line method (TLM) is employed to generate circular acoustic beams.
• Acoustic beams are precisely focused at a designated listening point.
• Performance is evaluated by comparing TLM with acoustic contrast control (ACC).

Main Results:

• The TLM successfully produces focused circular acoustic beams.
• TLM demonstrates comparable acoustic contrast and array effort to ACC under specific conditions.
• TLM offers a significant advantage in signal processing simplicity.

Conclusions:

• The tangent line method (TLM) is a viable technique for acoustic field confinement in personal audio.
• TLM provides a simpler alternative to ACC, with comparable performance in key metrics.
• This method enhances the feasibility of advanced acoustic beamforming in consumer devices.