Element-based acoustic models scale poorly as wavelength shortens

Evidence

In a room with a complex shape, both image-source and ray-tracing methods are problematic at low frequencies. Features like corners, object edges, and curved surfaces exhibit phenomena, such as diffraction, that are not easily simulated with these techniques. Different element-based techniques are more accurate in such cases. — Ville Pulkki, Matti Karjalainen, Communication Acoustics- An…, 303 (#complicates, via linked claim)

Categorization

• XREF: connects to: Air cells for sound simulation must be far smaller than the shortest wavelength — Eric J. Heller, Why You Hear What You Hear- An…, 96; Wave diffraction studies can scale down by raising frequency proportionally; Acoustic wavelength size relative to objects governs how sound interacts with them (+4 more)

Related

• Geometric acoustics fails on diffraction at low frequencies in complex rooms (similarity 0.89)
• Air cells for sound simulation must be far smaller than the shortest wavelength (similarity 0.86)
• Ray-tracing and image-source methods fail on low-frequency diffraction at corners (similarity 0.84)
• Acoustic diffusion needs surface bumps sized between an eighth and a half wavelength (similarity 0.83)
• Acoustic wavelength size relative to objects governs how sound interacts with them (similarity 0.81)
• Small vibrating objects radiate weak sound because source size is far under one wavelength (similarity 0.81)
• Reflection and diffraction of sound both depend on object size relative to wavelength (similarity 0.80)
• Effective sound diffusion demands surface depths proportional to the target wavelength (similarity 0.80)
• More diffraction occurs for longer-wavelength, lower-frequency sound (similarity 0.79)
• Diffusor effectiveness in small listening rooms lacks subjective validation (similarity 0.79)
• Effective sound diffusion requires bumps sized between an eighth and half a wavelength. (similarity 0.79)

Broader Connections

• Reflection and diffraction of sound both depend on object size relative to wavelength #expands (0.82)
• Acoustic wavelength size relative to objects governs how sound interacts with them #expands (0.80)
• Geometric acoustics fails on diffraction at low frequencies in complex rooms #complicates (0.75) — Ville Pulkki, Matti Karjalainen, Communication Acoustics- An…, 303
• Acoustic diffusion needs surface bumps sized between an eighth and a half wavelength #exemplifies (0.72)
• Effective sound diffusion demands surface depths proportional to the target wavelength #exemplifies (0.70)