Tweak kDecayRate in the IntelligibilityEnhancer

webrtc/modules/audio_processing/intelligibility/intelligibility_enhancer.cc

Index: webrtc/modules/audio_processing/intelligibility/intelligibility_enhancer.cc
diff --git a/webrtc/modules/audio_processing/intelligibility/intelligibility_enhancer.cc b/webrtc/modules/audio_processing/intelligibility/intelligibility_enhancer.cc
index c98833e05a530fd9eab6c656bd673f1e03af2977..de36b7a8bc75c943fb436326b8f067e4ca948215 100644
--- a/webrtc/modules/audio_processing/intelligibility/intelligibility_enhancer.cc
+++ b/webrtc/modules/audio_processing/intelligibility/intelligibility_enhancer.cc
@@ -34,8 +34,8 @@ const float kLambdaTop = -1e-5f;      // search for lamda.
 const float kVoiceProbabilityThreshold = 0.02f;
 // Number of chunks after voice activity which is still considered speech.
 const size_t kSpeechOffsetDelay = 80;
-const float kDecayRate = 0.98f;              // Power estimation decay rate.
-const float kMaxRelativeGainChange = 0.04f;  // Maximum relative change in gain.
+const float kDecayRate = 0.994f;              // Power estimation decay rate.
+const float kMaxRelativeGainChange = 0.006f;
 const float kRho = 0.0004f;  // Default production and interpretation SNR.
 const float kPowerNormalizationFactor = 1.f / (1 << 30);