diff --git a/docs/en/module/fan.md b/docs/en/module/fan.md
index c162b86d..c1a0912c 100644
--- a/docs/en/module/fan.md
+++ b/docs/en/module/fan.md
@@ -16,7 +16,7 @@
 - Rated current: 0.14 A
 - Power consumption: 0.7W
 - Speed: 7500 ± 10% RPM
-- Noise: 300BA
+- Noise: 30DBA
 - Bearing: Hydraulic bearing
 - Wiring: red line positive, black line negative
 - Product Size：54.2mm x 54.2mm x 12.8mm
diff --git a/docs/zh_CN/module/fan.md b/docs/zh_CN/module/fan.md
index d8136b1a..efda47a3 100644
--- a/docs/zh_CN/module/fan.md
+++ b/docs/zh_CN/module/fan.md
@@ -16,7 +16,7 @@
 -  额定电流：0.14 A
 -  消耗功率：0.7W
 -  转速：7500±10%RPM
--  噪音：300BA
+-  噪音：30DBA
 -  轴承：液压轴承
 -  接线：红线正极，黑线负极
 -  产品尺寸：54.2mm x 54.2mm x 12.8mm