Sound Transmission Class (STC ) is an integer rating of how well a building partition attenuates airborne sound. In the USA, it is widely used to rate interior partitions, ceilings and floors, doors, windows and exterior wall configurations (see ASTM International Classification E413 and E90).

2023年3月30日 · When people are evaluating building materials and acoustical products for sound reduction, they rely on the sound transmission class or STC rating of the product. By understanding this rating of materials, we know how much sound will be blocked from going through those materials.

2018年9月17日 · STC stands for Sound Transmission Class. It is the ability of a product or material to reduce the transmission of sound between rooms. It measures how much sound a wall, door, window or ventilation system, for instance, will block noise from getting through to …

2024年10月30日 · STC（Sound Transmission Class）是一個用來表示裝修物件（例如牆壁、門、窗等）隔音能力的指標，表示該裝修物件隔音的效果。STC 的數字越高，隔音效果越好，且 STC 是以分貝（dB）為單位。

“When we say STC 35, it means the enclosure, wall partition or door will reduce noise by 35 decibels. The same logic applies to solutions rated as STC 45 and 52.” Source: From Mecat – a manufacturer of acoustic enclosures and products.

Below are the STC ratings of various wall assemblies, each presented to help illustrate concepts, improvements and rules of thumb. The estimated ratings are based on laboratory test results from various compendiums of STC ratings.

2023年10月23日 · 声音传输等级 (stc) 评级是用于衡量建筑材料或隔板抵抗空气传播声音传播能力的尺度。 评级表示材料或隔板提供的隔音分贝数。 STC 等级根据 ASTM E413-10 标准通过测量不同频率下通过隔板（墙壁、窗户、门等）的声音传输损失 (TL)

2025年3月7日 · If the STC rating is 35, that means the material in question can reduce sound transfer by 35 decibels. Of course, the rating is determined as an average based on the different frequencies between 125 Hz to 4000 Hz. The lower the frequency, the more difficult it is to reduce the decibels that pass through the material.

3 天之前 · Airborne noise is anything traveling through the air—TV chatter, street traffic, or a neighbor’s shouting match. STC tells you how well your walls, ceilings, or doors hold that noise back, keeping your space quieter. For example, a standard drywall wall might hit STC 35—loud voices still leak through, annoying but audible.

美国(按照美国材料试验标准ASTWE-90，E-413)采用隔声等级，即STC(Sound Transmission Class)等级。STC是一个简单数字等级。大多数情况下与Rw相等。可以互相替代使用。 STC是在实验室条件下对于单个构件测量得到的，实际现场隔声性能使用噪声隔绝等级NIC更加准确。