Which technique is specifically NOT aimed at improving sound quality in AV design?

Choosing electrical insulation as the technique specifically NOT aimed at improving sound quality in audiovisual design makes sense because electrical insulation pertains to preventing electrical currents from leaking or transferring inappropriately, thus protecting electronic equipment and ensuring safety. While electrical insulation is crucial for the safety and functionality of AV systems, it does not directly influence sound quality.

In contrast, techniques like acoustic paneling, sound absorption materials, and sound diffusion techniques are all directly intended to enhance sound quality. Acoustic paneling and sound absorption materials help reduce unwanted echoes and reverb, enhancing clarity and minimizing noise interference. Sound diffusion techniques work to scatter sound waves evenly throughout a space, which also contributes to a more balanced and pleasant auditory experience. These methods focus specifically on optimizing the acoustic environment, making them essential for achieving high-quality audio results in AV design.