What is an acoustic insulated flexible duct? It is a specialized HVAC component engineered to transport air while providing a means to attenuate noise generated by fans and air movement.By incorporating a perforated inner core, these ducts—such as the QIANJINGDUCT SONO series—are designed to channel sound energy into a surrounding insulation layer for dissipation in noise-sensitive environments.
HOW SOUND ATTENUATION
How Sound Attenuation Works in Ducting
Standard insulated ducts prioritize thermal resistance. Acoustic ducts, however, utilize a perforated inner core. Micro-perforations in the core allow sound waves to enter the insulation material (typically glass wool), where the acoustic energy is reduced through friction and absorption.
QIANJINGDUCT SONO Series Configurations
The SONO series offers different mechanical constructions to suit varied project needs:
- SONO 2.0: Features a 1-ply aluminum and polyester inner core for standard ventilation requirements.
- SONO 3.0: Utilizes a 2-ply aluminum and polyester inner core for enhanced mechanical construction and durability.
TECHNICAL SPECIFICATIONS IMDUCT
Technical Specifications (QIANJINGDUCT SONO Series)
| Feature | Specification (Manufacturer Rated) |
|---|---|
| Inner Core | Perforated Aluminum / Polyester Composite |
| Insulation | 25mm / 50mm Glass Wool (Available in 12kg/m³ or 16kg/m³) |
| R-Value Range | R4.2, R6.0, R8.0 (Configuration Dependent) |
| Temperature Range | -30°C to +130°C |
| Max Operating Pressure | 2500 Pa |
APPLICATIONS FOR ACOUSTIC
Applications for Acoustic Insulated Ducts
- Noise-Sensitive Studios: Designed to attenuate duct-borne noise and localized fan hum in recording and broadcast environments.
- Healthcare Environments: May be considered for healthcare spaces requiring acoustic comfort, subject to specific project acoustic design requirements.
- Commercial Offices: Helps reduce background HVAC noise to maintain a professional environment in conference rooms.
- Hospitality: Enhances guest comfort by managing airflow noise in guest quarters and sleeping areas.
- Industrial Proximity: Used near air-handling equipment to reduce noise transmission at the source.
INSTALLATION GUIDELINES FOR
Installation Guidelines for Sound Control
- Gradual Bends: Sharp turns generate turbulence, which creates new airflow noise. Ensure all bends follow a generous radius.
- Mechanical Integrity: Ensure the duct is fully extended and not sagging. Excessive compression can negatively impact both airflow and acoustic performance.
- Secure Sealing: Use Compatible Duct Clamps to establish a secure mechanical connection, preventing whistling at the joints.
TECHNICAL COMPLIANCE
Technical Compliance
Selecting an acoustic duct involves verifying both sound attenuation and fire safety properties. IMDUCT manufactures the SONO series to meet specified technical parameters; however, final project suitability must always be confirmed against local building codes and professional acoustic evaluations.
Common Questions
FAQ
Q: Can acoustic ducts replace standard thermal insulation?
A: Yes, acoustic ducts like the SONO series provide thermal R-values (R4.2 to R8.0) comparable to standard insulated ducts while offering the additional benefit of sound attenuation.
Q: Does soundproof ducting block external noise from entering the room?
A: These ducts are primarily engineered to attenuate internal duct-borne noise (sound traveling with the air). While they provide some wall-transmission loss, they are not a substitute for external acoustic insulation or specialized partitions.
Q: Are there alternatives to glass wool insulation?
A: QIANJINGDUCT offers several insulation configurations. For environments with specific material restrictions, please request data sheets for our non-glass wool product variants.
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