Comprehensive Guide to Studio Noise Control with Acoustic Cotton (Professional-Grade Solutions)
Comprehensive Guide to Studio Noise Control with Acoustic Cotton (Professional-Grade Solutions)
I. Core Treatment Principles
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Tri-band Acoustic Treatment
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High frequencies (2000Hz+): 5cm polyester fiber cotton directly adhered to walls
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Mid frequencies (500-2000Hz): 10cm centrifugal glass wool + 5cm air cavity
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Low frequencies (<500Hz): Install 40×40cm bass traps in corners (filled with high-density rock wool)
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Critical Parameter Control
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Density selection: 80-100kg/m³ for mid-high frequencies, 120-150kg/m³ for low frequencies
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Minimum thickness: 1/4 wavelength of target frequency (e.g., 85cm for 100Hz, reducible to 30cm via air cavity design)
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Absorption coefficient: Target α≥0.8 for critical frequency ranges
II. Six-Step Installation Methodology
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Surface Preparation
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Wall pretreatment: Dust removal → Moisture-proof primer → 2mm soundproofing membrane
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Seam treatment: All joints sealed with butyl tape (5cm overlap minimum)
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Framework Construction
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Light steel keel framework (60×60cm grid)
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Air cavity reservation: 10-15cm for walls, 15-20cm for ceilings
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Vibration isolators: Rubber suspension hangers (spaced ≤80cm)
3.Special Node Treatment
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Windows/doors: Double-glazed units + magnetic seals
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Electrical boxes: Pre-installed metal enclosures with acoustic cotton filling
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Ventilation: Z-shaped silencer ducts + honeycomb acoustic cotton
4.Acceptance Standards
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A-weighted noise level ≤25dB
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Reverberation time: 0.3±0.05s (500Hz)
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Frequency response fluctuation ≤±3dB (100-4000Hz)
III. Advanced Solutions
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Dynamic Absorption System
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Motorized acoustic curtains (adjustable absorption)
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Tunable bass traps (rotary Helmholtz resonators)
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Smart Monitoring System
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Real-time acoustic analyzer (NTi Audio XL2)
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Auto-EQ compensation (DSP-based frequency correction)
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Integrated Noise Control
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Active noise cancellation: Phase inversion for 63-250Hz low frequencies
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Floating floor: Spring isolators + 10cm rock wool filling
Note: Conduct spectrum analysis (REW software) before construction, focusing on 63Hz/125Hz/250Hz standing waves. Professional studios should implement "room-within-room" construction for STC≥65 sound isolation.