Spigoacustic and Spigotec A+ wood acoustic panels

All panel models in the Spigoacustic and Spigotec catalogues are A+ wood acoustic panels. What does this label mean?

CORRUGATED ACOUSTICAL WALL PANELS

Spigoacustic - Spigo Group

Acousti-Panels (AP) - G&S Acoustics

Wood Punched Acoustic Panel MDF Grooved Wall Soundproof Square Perforated Timber Wooden Soundproofing Board

eSCAPE Acoustic Panels and Privacy Solutions - Sound Absorbing Acoustical Panels and Privacy Screens

Spigo Group on LinkedIn: Spigoacustic and Spigotec A+ wood acoustic panels

Wooden Perforated Acoustic Panels - Acoustic Panels Manufacturer

Acousti-Panels (AP) - G&S Acoustics

Acoustic Wood Panel PH5

Sunwings 94.5'' x 23.6'' Wood Slat Acoustic Wall Panels & Reviews

Sunwings 94.5'' x 23.6'' Wood Slat Acoustic Wall Panels & Reviews

Sunwings 94.5'' x 23.6'' Wood Slat Acoustic Wall Panels & Reviews

Spigoacustic - Spigo Group

Acousti-Panels (AP) - G&S Acoustics

Spigogroup extends its acoustic panels outlet with new models