diff --git a/akka-bbb-apps/src/main/scala/org/bigbluebutton/SystemConfiguration.scala b/akka-bbb-apps/src/main/scala/org/bigbluebutton/SystemConfiguration.scala
index aacc7ff279..c0ce28edec 100755
--- a/akka-bbb-apps/src/main/scala/org/bigbluebutton/SystemConfiguration.scala
+++ b/akka-bbb-apps/src/main/scala/org/bigbluebutton/SystemConfiguration.scala
@@ -43,6 +43,7 @@ trait SystemConfiguration {
   lazy val ejectRogueVoiceUsers = Try(config.getBoolean("voiceConf.ejectRogueVoiceUsers")).getOrElse(true)
   lazy val dialInApprovalAudioPath = Try(config.getString("voiceConf.dialInApprovalAudioPath")).getOrElse("ivr/ivr-please_hold_while_party_contacted.wav")
   lazy val toggleListenOnlyAfterMuteTimer = Try(config.getInt("voiceConf.toggleListenOnlyAfterMuteTimer")).getOrElse(4)
+  lazy val transparentListenOnlyThreshold = Try(config.getInt("voiceConf.transparentListenOnlyThreshold")).getOrElse(0)
 
   lazy val recordingChapterBreakLengthInMinutes = Try(config.getInt("recording.chapterBreakLengthInMinutes")).getOrElse(0)
 
diff --git a/akka-bbb-apps/src/main/scala/org/bigbluebutton/core/apps/voice/VoiceApp.scala b/akka-bbb-apps/src/main/scala/org/bigbluebutton/core/apps/voice/VoiceApp.scala
index efb6218611..fa2bd08e2a 100755
--- a/akka-bbb-apps/src/main/scala/org/bigbluebutton/core/apps/voice/VoiceApp.scala
+++ b/akka-bbb-apps/src/main/scala/org/bigbluebutton/core/apps/voice/VoiceApp.scala
@@ -260,7 +260,7 @@ object VoiceApp extends SystemConfiguration {
       callingInto:  String,
       hold:         Boolean,
       uuid:         String  = "unused"
-  ): Unit = {
+  )(implicit context: akka.actor.ActorContext): Unit = {
 
     def broadcastEvent(voiceUserState: VoiceUserState): Unit = {
       val routing = Routing.addMsgToClientRouting(
@@ -323,8 +323,28 @@ object VoiceApp extends SystemConfiguration {
       hold,
       uuid
     )
+
+    val prevTransparentLOStatus = VoiceHdlrHelpers.transparentListenOnlyAllowed(
+      liveMeeting
+    )
+
     VoiceUsers.add(liveMeeting.voiceUsers, voiceUserState)
 
+    val newTransparentLOStatus = VoiceHdlrHelpers.transparentListenOnlyAllowed(
+      liveMeeting
+    )
+
+    if (prevTransparentLOStatus != newTransparentLOStatus) {
+      // If the transparent listen only mode was activated or deactivated
+      // we need to update the listen only mode for all users in the meeting
+      // that are not muted.
+      handleTransparentLOModeChange(
+        liveMeeting,
+        outGW,
+        newTransparentLOStatus
+      )
+    }
+
     broadcastEvent(voiceUserState)
 
     if (liveMeeting.props.meetingProp.isBreakout) {
@@ -473,6 +493,22 @@ object VoiceApp extends SystemConfiguration {
     }
   }
 
+  def handleTransparentLOModeChange(
+    liveMeeting: LiveMeeting,
+    outGW:       OutMsgRouter,
+    allowed:     Boolean,
+  )(implicit context: akka.actor.ActorContext): Unit = {
+    VoiceUsers.findAllMutedVoiceUsers(liveMeeting.voiceUsers) foreach { vu =>
+      toggleListenOnlyMode(
+        liveMeeting,
+        outGW,
+        vu.intId,
+        vu.callerNum,
+        allowed
+      )
+    }
+  }
+
   def toggleListenOnlyMode(
     liveMeeting:    LiveMeeting,
     outGW:          OutMsgRouter,
@@ -482,6 +518,16 @@ object VoiceApp extends SystemConfiguration {
     delay:          Int = 0
   )(implicit context: ActorContext): Unit = {
     implicit def executionContext = context.system.dispatcher
+    val allowed = VoiceHdlrHelpers.transparentListenOnlyAllowed(liveMeeting)
+    // Guarantee there are no other tasks for this channel
+    removeToggleListenOnlyTask(userId)
+
+    // If the meeting has not yet hit the minium amount of duplex channels
+    // for transparent listen only to be enabled, we don't need to do anything
+    if (!allowed && enabled) {
+      return
+    }
+
     def broacastEvent(): Unit = {
       val event = MsgBuilder.buildToggleListenOnlyModeSysMsg(
         liveMeeting.props.meetingProp.intId,
@@ -493,9 +539,6 @@ object VoiceApp extends SystemConfiguration {
       outGW.send(event)
     }
 
-    // Guarantee there are no other tasks for this channel
-    removeToggleListenOnlyTask(userId)
-
     if (enabled && delay > 0) {
       // If we are enabling listen only mode, we wait a bit before actually
       // dispatching the command - the idea is that recently muted users
diff --git a/akka-bbb-apps/src/main/scala/org/bigbluebutton/core/apps/voice/VoiceHdlrHelpers.scala b/akka-bbb-apps/src/main/scala/org/bigbluebutton/core/apps/voice/VoiceHdlrHelpers.scala
index cc9e59310f..ad5bf60a61 100644
--- a/akka-bbb-apps/src/main/scala/org/bigbluebutton/core/apps/voice/VoiceHdlrHelpers.scala
+++ b/akka-bbb-apps/src/main/scala/org/bigbluebutton/core/apps/voice/VoiceHdlrHelpers.scala
@@ -50,4 +50,14 @@ object VoiceHdlrHelpers extends SystemConfiguration {
       case _ => false
     }
   }
+
+  def transparentListenOnlyAllowed(liveMeeting: LiveMeeting): Boolean = {
+    // Transparent listen only meeting-wide activation threshold.
+    // Threshold is the number of muted duplex audio channels in a meeting.
+    // 0 means no threshold, all users are subject to it
+    val mutedDuplexChannels = VoiceUsers.findAllMutedVoiceUsers(liveMeeting.voiceUsers).length
+    val threshold = transparentListenOnlyThreshold
+
+    (threshold == 0) || (mutedDuplexChannels >= threshold)
+  }
 }
diff --git a/akka-bbb-apps/src/main/scala/org/bigbluebutton/core/models/VoiceUsers.scala b/akka-bbb-apps/src/main/scala/org/bigbluebutton/core/models/VoiceUsers.scala
index abac75842b..a56b4ef176 100755
--- a/akka-bbb-apps/src/main/scala/org/bigbluebutton/core/models/VoiceUsers.scala
+++ b/akka-bbb-apps/src/main/scala/org/bigbluebutton/core/models/VoiceUsers.scala
@@ -33,6 +33,7 @@ object VoiceUsers {
   def findAllListenOnlyVoiceUsers(users: VoiceUsers): Vector[VoiceUserState] = users.toVector.filter(u => u.listenOnly == true)
   def findAllFreeswitchCallers(users: VoiceUsers): Vector[VoiceUserState] = users.toVector.filter(u => u.calledInto == "freeswitch")
   def findAllKurentoCallers(users: VoiceUsers): Vector[VoiceUserState] = users.toVector.filter(u => u.calledInto == "kms")
+  def findAllMutedVoiceUsers(users: VoiceUsers): Vector[VoiceUserState] = users.toVector.filter(u => u.muted == true && u.listenOnly == false)
 
   def findAllBannedCallers(users: VoiceUsers): Vector[VoiceUserState] = users.bannedUsers.values.toVector
 
diff --git a/akka-bbb-apps/src/universal/conf/application.conf b/akka-bbb-apps/src/universal/conf/application.conf
index c64b995127..bcce19dc92 100755
--- a/akka-bbb-apps/src/universal/conf/application.conf
+++ b/akka-bbb-apps/src/universal/conf/application.conf
@@ -97,6 +97,11 @@ voiceConf {
   # Time (seconds) to wait before requesting an audio channel hold after
   # muting a user. Used in the experimental, transparent listen only mode.
   toggleListenOnlyAfterMuteTimer = 4
+
+  # Transparent listen only meeting-wide activation threshold.
+  # Threshold is the number of muted duplex audio channels in a meeting.
+  # 0 = disabled
+  transparentListenOnlyThreshold = 0
 }
 
 recording {