RIAA equalization
（重定向自RIAA curve）
![The RIAA equalization curve for playback of vinyl records. The recording curve performs the inverse function, reducing low frequencies and boosting high frequencies.](/Images/godic/202502/07/RIAA-EQ-Curve.svg2603.png")
RIAA equalization is a specification for the recording and playback of phonograph records, established by the Recording Industry Association of America (RIAA). The purposes of the equalization are to permit greater recording times (by decreasing the mean width of each groove), to improve sound quality, and to reduce the groove damage that would otherwise arise during playback.