diff --git a/neo/sound/snd_local.h b/neo/sound/snd_local.h
index 8705c7bd..ccb1125b 100644
--- a/neo/sound/snd_local.h
+++ b/neo/sound/snd_local.h
@@ -593,7 +593,8 @@ public:
 	idStr					listenerAreaName;
 	ALuint					listenerEffect;
 	ALuint					listenerSlot;
-	ALuint					listenerFilter;
+	bool					listenerAreFiltersInitialized;
+	ALuint					listenerFilters[2]; // 0 - direct; 1 - send.
 
 	int						gameMsec;
 	int						game44kHz;
diff --git a/neo/sound/snd_world.cpp b/neo/sound/snd_world.cpp
index b79317a6..5ef70947 100644
--- a/neo/sound/snd_world.cpp
+++ b/neo/sound/snd_world.cpp
@@ -61,23 +61,37 @@ void idSoundWorldLocal::Init( idRenderWorld *renderWorld ) {
 			}
 		}
 
-		if (!soundSystemLocal.alIsFilter(listenerFilter)) {
-			alGetError();
+		if (!listenerAreFiltersInitialized) {
+			listenerAreFiltersInitialized = true;
 
-			soundSystemLocal.alGenFilters(1, &listenerFilter);
+			alGetError();
+			soundSystemLocal.alGenFilters(2, listenerFilters);
 			ALuint e = alGetError();
 			if (e != AL_NO_ERROR) {
 				common->Warning("idSoundWorldLocal::Init: alGenFilters failed: 0x%x", e);
-				listenerFilter = AL_FILTER_NULL;
+				listenerFilters[0] = AL_FILTER_NULL;
+				listenerFilters[1] = AL_FILTER_NULL;
 			} else {
-				soundSystemLocal.alFilteri(listenerFilter, AL_FILTER_TYPE, AL_FILTER_LOWPASS);
+				soundSystemLocal.alFilteri(listenerFilters[0], AL_FILTER_TYPE, AL_FILTER_LOWPASS);
 				// original EAX occusion value was -1150
 				// default OCCLUSIONLFRATIO is 0.25
+				// default OCCLUSIONDIRECTRATIO is 1.0
 
-				// pow(10.0, (-1150*0.25)/2000.0)
-				soundSystemLocal.alFilterf(listenerFilter, AL_LOWPASS_GAIN, 0.718208f);
-				// pow(10.0, -1150/2000.0)
-				soundSystemLocal.alFilterf(listenerFilter, AL_LOWPASS_GAINHF, 0.266073f);
+				// pow(10.0, (-1150*0.25*1.0)/2000.0)
+				soundSystemLocal.alFilterf(listenerFilters[0], AL_LOWPASS_GAIN, 0.718208f);
+				// pow(10.0, (-1150*1.0)/2000.0)
+				soundSystemLocal.alFilterf(listenerFilters[0], AL_LOWPASS_GAINHF, 0.266073f);
+
+
+				soundSystemLocal.alFilteri(listenerFilters[1], AL_FILTER_TYPE, AL_FILTER_LOWPASS);
+				// original EAX occusion value was -1150
+				// default OCCLUSIONLFRATIO is 0.25
+				// default OCCLUSIONROOMRATIO is 1.5
+
+				// pow(10.0, (-1150*(0.25+1.5-1.0))/2000.0)
+				soundSystemLocal.alFilterf(listenerFilters[1], AL_LOWPASS_GAIN, 0.370467f);
+				// pow(10.0, (-1150*1.5)/2000.0)
+				soundSystemLocal.alFilterf(listenerFilters[1], AL_LOWPASS_GAINHF, 0.137246f);
 			}
 		}
 	}
@@ -113,6 +127,7 @@ idSoundWorldLocal::idSoundWorldLocal
 ===============
 */
 idSoundWorldLocal::idSoundWorldLocal() {
+	listenerAreFiltersInitialized = false;
 }
 
 /*
@@ -147,9 +162,14 @@ void idSoundWorldLocal::Shutdown() {
 			listenerSlot = AL_EFFECTSLOT_NULL;
 		}
 
-		if (soundSystemLocal.alIsFilter(listenerFilter)) {
-			soundSystemLocal.alDeleteFilters(1, &listenerFilter);
-			listenerFilter = AL_FILTER_NULL;
+		if (listenerAreFiltersInitialized) {
+			listenerAreFiltersInitialized = false;
+
+			if (listenerFilters[0] != AL_FILTER_NULL && listenerFilters[1] != AL_FILTER_NULL) {
+				soundSystemLocal.alDeleteFilters(2, listenerFilters);
+				listenerFilters[0] = AL_FILTER_NULL;
+				listenerFilters[1] = AL_FILTER_NULL;
+			}
 		}
 	}
 
@@ -1792,9 +1812,10 @@ void idSoundWorldLocal::AddChannelContribution( idSoundEmitterLocal *sound, idSo
 
 			if (idSoundSystemLocal::useEFXReverb) {
 				if (enviroSuitActive) {
-					alSourcei(chan->openalSource, AL_DIRECT_FILTER, listenerFilter);
-					alSource3i(chan->openalSource, AL_AUXILIARY_SEND_FILTER, listenerSlot, 0, listenerFilter);
+					alSourcei(chan->openalSource, AL_DIRECT_FILTER, listenerFilters[0]);
+					alSource3i(chan->openalSource, AL_AUXILIARY_SEND_FILTER, listenerSlot, 0, listenerFilters[1]);
 				} else {
+					alSourcei(chan->openalSource, AL_DIRECT_FILTER, AL_FILTER_NULL);
 					alSource3i(chan->openalSource, AL_AUXILIARY_SEND_FILTER, listenerSlot, 0, AL_FILTER_NULL);
 				}
 			}