Can air pass through? Looking for a way to dampen sound traveling through heat registers.

Air CAN pass through minimally, but you don’t want to put these ANYWHERE near a heat source. VERY hazardous.

Do the different shapes available for purchase absorb different frequencies or is it purely aesthetic?

The corner panels are intended to capture bass frequencies, since they’re the frequencies you hear in the bleed of walls. None of these panels will “soundproof” your room, however they will help prevent unwanted room reflections. The flat panels are intended to absorb higher frequencies.

are they black or charcoal?

They are not black, but a dark charcoal gray. I've purchased 6 sets (of 12 panels) over a couple months, and the charcoal color varies within each set by a shade or two. Some have a sparkly, metallic sheen, while others are duller. Big variations on exact size of each panel as well. They still look good when installed, and work great for absorbing voice echo in the room (a home voice over recording studio).

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Sonic Acoustics 12 Pack Acoustic Foam Panels 7" X 7" X 12" Sound Absorbing Panel, Bass Trap Studio Foam, Corner Block Finish, Sound Panels Soundproof Sound Insulation Absorbing

Sonic Acoustics 12 Pack Acoustic Foam Panels 7" X 7" X 12" Sound Absorbing Panel, Bass Trap Studio Foam, Corner Block Finish, Sound Panels Soundproof Sound Insulation Absorbing

Product ID: 350365606

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Details

Material
Polyurethane
Brand
Sonic
Item thickness
7 Inches
Recommended uses for product
Soundproofing
Product dimensions
30.5L x 17.8W

⚡Expands to full size within 48 hours from vacuum pack

📏7" x 7" x 12" perfect bass trap dimensions

🔇50 lbs/yd³ density for superior noise reduction

Description

🎧 Elevate your sound space—because your audio deserves the best!

VERSATILE PLACEMENT - Easily cut and shape to fit studios, offices, or home theaters without losing effectiveness.
DEEP BASS ABSORPTION - Specialized bass trap shape targets low frequencies to eliminate muddiness in your space.
RAPID EXPANSION TECH - Vacuum-sealed panels rebound to full size in 24-48 hours or with a quick water soak.
RISK FREE INVESTMENT - US-based customer support with hassle-free refunds or replacements ensures peace of mind.
PRECISION SOUND CONTROL - 3D acoustic design breaks up sound waves for professional-grade noise reduction.

Sonic Acoustics 12 Pack Acoustic Foam Panels deliver professional soundproofing with high-density, 7"x7"x12" bass traps designed to reduce noise and reverberation. Vacuum-packed for compact shipping, these panels quickly expand to full size and can be customized for any room, making them ideal for studios, offices, and home theaters. Backed by US-based customer service, they offer a reliable solution for superior sound absorption and acoustic clarity.

Specifications

Manufacturer	Sonic Acoustics
Item Weight	1.2 Kilograms
Product Dimensions	30.48 x 17.78 x 0.1 cm; 1.2 kg
Size	Bass Trap
Color	Black
Style	Black (Bass Trap)
Item Package Quantity	1
Coverage	378 square inches
Batteries Included?	No
Batteries Required?	No

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