Sound Transmission Class is a rating for evaluating the effectiveness of construction in isolating airborne sound transmission. Higher numbers indicate more effectiveness.
sound transmission class. a rating of the ability of building materials to stop the transmission of unwanted sounds. The rating is designed so that it expresses, as best one can with a single figure, the sound transmission loss in decibels when sound passes through the material. To determine the STC rating, test sounds of 16 different frequencies are transmitted through the barrier. The data is then smoothed to a standard contour using an established protocol, and the STC rating is the "smoothed" sound transmisson loss at a frequency of 500 hertz. Ordinary conversation can be understood through a window pane rated STC 25; a wall rated STC 50 stops all but the loudest shouting.
Sound Transmission Class is a number rating the effectiveness by which a material or building technique impairs or prevents the transmission of sound.
An abbreviation for sound transmission class, STC is a rating appplied to the construction of partitions (typically walls) to describe the degree of sonic isolation provided by that construction technique.
Sound Transmission Class. A single-number rating system used to compare the sound-isolating characteristics of partitions used to separate occupied spaces. Assemblies are rated in terms of Sound Transmission Classifications. An STC value of 20-25 would indicate that even low speech would be audible in an adjoining room. An STC value of 50-60, on the other hand, would indicate that loud sound would be heard only faintly or not at all.
Sound Transmission Class. A single-number system used to rate the sound transmission performance of a wall, panel, ceiling, etc. The higher the ranking, the better the ability to obstruct sound transmission.
See Sound Transmission Class
(Sound Transmission Class). A measure of sound stopping of ordinary noise.
Sound Transmission Class. A numerical rating of the sound control performance of a wall or ceiling; the higher the number, the better the sound control.
Sound transmission class. A single number rating the efficiency of building elements in reducing the transmission of noise. It is expressed in decibels and the larger the number, the greater the sound reduction achieved in the building.
Sound Transmission Class. This is a rating for doors, windows, enclosures, noise barriers, partitions and other acoustical products. The rating is in terms of their relative ability to provide privacy against intrusion of speech sounds. This is a one number rating system, heavily weighted in the 500Hz to 2000Hz frequency range where speech intelligitibility largely occurs.
Sound Transmission Class. A classification of the sound insulating properties of a material or structure. Sound Transmission Class is commonly used to rate office walls and furniture partitions.
Sound Transmission Class. The sound transmission loss rating of a material over a selected range of sound frequencies. The higher the number, the less sound transmitted.
This number represents how much noise is stopped by something. The higher the number the better: the scale is logarithmic, meaning each number is significantly higher than the next, like the Richter Scale for earthquake measurement. For more information, see our page on STC Ratings.
The measure of sound stopping of ordinary noise
Sound Transmission Class. The average value associated with a material's effectiveness to reduce sound. The higher the value, the greater the reduction of sound.
Sound Transmission Class. Overall single number performance rating of transmission loss. See transmission loss.
Sound Transmission Class. A rating measuring a window's acoustic properties or its ability to reduce sound transmission. An STC rating is determined by measuring the sound transmission over a selected range of sound frequencies. The higher the number, the less sound transmitted.
A single number rating derived from individual transmission losses at specified test frequencies. It is used for interior walls, ceilings and floors.
Abbreviation for sound transmission coefficient. A value which describes in relative terms the ability of a door to dampen the passage of noise. Doors with higher STC values permit less noise to pass through.