diff --git a/selfdrive/ui/soundd/sound.cc b/selfdrive/ui/soundd/sound.cc
index f039511ff..d07b6b6ef 100644
--- a/selfdrive/ui/soundd/sound.cc
+++ b/selfdrive/ui/soundd/sound.cc
@@ -46,7 +46,7 @@ void Sound::update() {
     return;
   }
 
-  // scale volume with speed
+  // scale volume using ambient noise level
   if (sm.updated("microphone")) {
     float volume = util::map_val(sm["microphone"].getMicrophone().getFilteredSoundPressureWeightedDb(), 30.f, 52.f, 0.f, 1.f);
     volume = QAudio::convertVolume(volume, QAudio::LogarithmicVolumeScale, QAudio::LinearVolumeScale);