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Standard for sound source isolation in sound-proof rooms for live broadcasting

Issuing time:2023-08-10 10:59Author:Youyinhui

Achieving effective sound source isolation in soundproof rooms for live broadcasting is essential to ensure high-quality audio without unwanted external noise interference. While there isn't a one-size-fits-all standard, there are several key considerations and guidelines that broadcasters typically follow to achieve optimal sound isolation:


STC Rating: Sound Transmission Class (STC) is a measure of a material's ability to block sound transmission. For soundproof rooms used in live broadcasting, the walls, ceiling, and floor should have a high STC rating to minimize the entry of external noise. A typical STC rating for walls in broadcasting studios could range from 50 to 70 or higher.

Double Walls: Implementing double walls with an air gap between them can significantly improve sound isolation. The air gap acts as an additional barrier that reduces sound transmission.

Floating Floors and Ceilings: Using floating floors and ceilings helps decouple the room from the building's structure, preventing vibrations and impact noise from transmitting through the floor or ceiling.

Seals and Gaskets: High-quality seals and gaskets around doors, windows, and any other openings are essential to prevent sound leakage. Automatic door bottoms or acoustic door seals can be used to create an airtight seal.


Mass and Density: Using dense and heavy materials for walls, such as mass-loaded vinyl or specialized soundproof drywall, helps block sound transmission. These materials absorb and dissipate sound energy, preventing it from passing through.

Isolation Booths for Equipment: If broadcasting equipment is located inside the room, consider using smaller isolation booths or enclosures for sensitive equipment to prevent their noise from interfering with the live broadcast.

HVAC and Ventilation: HVAC systems should be designed for minimal noise emission and vibration. Ductwork should be lined with acoustic materials to reduce airflow noise. Special attention should be given to ventilation design to ensure proper air exchange without compromising sound isolation.

Acoustic Treatment: While the primary goal is sound isolation, some strategic acoustic treatment can be applied inside the room to control reverberation and prevent internal reflections. This helps achieve optimal audio quality for broadcasts.

Electromagnetic Shielding: In addition to sound isolation, consider electromagnetic shielding to prevent interference from electronic devices or external radio frequency signals.

Proximity to Noise Sources: When designing the layout of the soundproof room, consider the proximity to potential noise sources outside the room. Position the room away from sources of external noise, such as mechanical rooms or high-traffic areas.

Site Selection: When possible, choose a location within the building that minimizes exposure to external noise sources, such as busy streets or noisy equipment.

Consultation with Acoustic Experts: Working with acoustic consultants or professionals with experience in designing soundproof environments for broadcasting can ensure that all critical factors are taken into account.


It's important to note that achieving effective sound source isolation involves a combination of architectural design, material selection, and proper construction techniques. The specific standards and practices may vary based on the broadcast facility's size, budget, and technical requirements. Consulting with acoustic experts and architects can help tailor the design to meet the unique needs of your live broadcasting setup.

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