
Commercial Soundproof Box for Appliance and Automotive Noise Testing. Ultra-Low Background Noise: Achieves a background noise floor as low as 25-30dB for precise testing. High Sound Insulation: Delivers 40dB reduction with single door and 45dB with double door. Durable Galvanized Steel: Features a robust outer shell made of galvanized steel sheet. Multi-Layer Acoustic Structure: Combines soundproofing, sound-absorbing layers, and egg-crate foam. Flexible Customization: Supports custom observation windows, mobile stands, and specific colors. Four Standard Sizes: Available in sizes ranging from 0.8m to 1.5m to fit various needs. Enhanced Sealing Locking: Uses high-elasticity strips and noise-lock to eliminate seam leakage. Comprehensive Warranty: Includes 1-year warranty and after-sales service coverage.