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.

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).

A sound blocking level of STC 40 can provide privacy between rooms if the speech level is no louder than general conversation. Once speech levels rise, phrases and sentences can be understood in adjacent rooms and will likely disrupt people. Acoustic standards, guidelines and building rating systems occasionally permit an STC rating as low as 40.

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. It is especially important in commercial construction.

2024年10月30日 · • stc 35-40：能聽到高聲量的談話聲，但普通對話會變得不清楚。 • STC 50 以上：隔音效果極佳，幾乎聽不到任何聲音。 STC 等級主要針對中高頻的聲音（500 Hz 到 2000 Hz），因此對低頻聲音（如低音或交通噪音）的效果較弱。

Sound Transmission Class (or STC) is an integer rating of how well a building partition attenuates airborne sound. In the US, it is widely used to rate interior partitions, ceilings, floors, doors, windows and exterior wall configurations. Outside the …

STC stands for Sound Transmission Class. STC ratings are an established way to average how much sound is stopped by something. STC ratings are used for windows, doors, walls and most building materials. For windows, STC ratings range from 18 to 38. STC ratings are the ONLY way to accurately compare various noise reduction products.

Here’s what different STC ratings mean for your soundproofing needs: STC 25-30: Normal speech can be heard clearly through the barrier. STC 30-40: Loud speech can be heard, but not entirely clear. STC 40-50: You can hear some muffled sounds, but not specific words. STC 50-60: Sound is barely heard, providing solid privacy.

2024年6月15日 · A basic wood structure floor/ceiling typically has an STC rating of 40-43, while a six-inch concrete sub-floor has a rating of 52-55. Understanding the STC ratings for floors is essential when designing a space that requires soundproofing, such as an apartment building or a commercial space with multiple floors.

2023年3月10日 · 该标准采用声传递量（Sound Transmission Class，STC）和室内声级差（Indoor-Outdoor Sound Reduction Index，IOR）两个参数来评估窗户对噪音的隔绝能力。 根据该标准，住宅建筑物的窗户应具有以下隔音等级：- 城市道路噪声较小区域：STC≥30，IOR≥25dB- 城市道路噪声较大区域：STC≥35，IOR≥30dB- 高速公路、机场、铁路等重噪声区域：STC≥40，IOR≥35dB此外，该标准还规定了窗户的安装要求、测试方法和评价标准等内容 …