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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Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

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

Product ID: 350365606

Details

Brand
Sonic
Item thickness
7 Inches
Material
Polyurethane
Product dimensions
30.5L x 17.8W

📏378 sq in coverage per pack

🔇7" thick sound absorption

♻️Eco-friendly polyurethane foam

Description

🎧 Silence never looked this sleek — upgrade your space, upgrade your sound.

RELIABLE SUPPORT - US-based customer service with hassle-free refunds or replacements for peace of mind.
VERSATILE PLACEMENT - Easily cut and shape to fit studios, offices, or home theaters without losing performance.
RAPID EXPANSION TECH - Vacuum-sealed foam expands to full size within 24-48 hours or after a quick water soak.
ECO CONSCIOUS COMFORT - Made from non-toxic, environmentally friendly polyurethane foam for safe indoor use.
PRECISION SOUND CONTROL - 7-inch thick panels engineered to break up sound waves and reduce noise effectively.

Sonic Acoustics 12 Pack Acoustic Foam Panels deliver professional-grade sound absorption with 7-inch thick, eco-friendly polyurethane foam. Covering 378 square inches per pack, these panels reduce noise and reverb in studios, offices, and home theaters. Vacuum-sealed for compact shipping, they expand quickly and can be easily customized to fit any space. Backed by US-based customer support, they offer a reliable solution for soundproofing needs.

Specifications

ASIN	B08QFPWPTR
ASIN	B08QFPWPTR
Brand Name	Sonic Acoustics
Coverage	378 square inches
Customer Reviews	4.1 4.1 out of 5 stars (661)
Customer reviews	4.1 4.1 out of 5 stars (661)
Date First Available	4 February 2021
Item Dimensions L x W	30.5L x 17.8W centimeters
Item Thickness	7 Inches
Manufacturer	Sonic Acoustics
Manufacturer	Sonic Acoustics
Material Type	Polyurethane
Product Dimensions	30.48 x 17.78 x 0.1 cm; 1.2 kg
Recommended Uses For Product	Soundproofing, reducing noise and reverb in recording studios, control rooms, offices, home studios, home entertainment theaters, and home offices
Unit Count	12.0 Count

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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