diff --git a/bot.cpp b/bot.cpp
index 282a50d..31eab52 100644
--- a/bot.cpp
+++ b/bot.cpp
@@ -237,6 +237,8 @@ void BotSpawnInit( bot_t &pBot )
    
    pBot.f_pause_look_time = 0.0;
 
+   pBot.f_current_hearing_sensitivity = -1;
+
    memset(&(pBot.current_weapon), 0, sizeof(pBot.current_weapon));
    memset(&(pBot.m_rgAmmo), 0, sizeof(pBot.m_rgAmmo));
 }
@@ -2084,6 +2086,8 @@ void BotThink( bot_t &pBot )
    
    pBot.b_low_health = BotLowHealth(pBot);
 
+   BotUpdateHearingSensitivity(pBot);
+
    // does bot need to say a message and time to say a message?
    if ((pBot.b_bot_say) && (pBot.f_bot_say < gpGlobals->time))
    {
diff --git a/bot.h b/bot.h
index fb0754c..053dd4b 100644
--- a/bot.h
+++ b/bot.h
@@ -301,6 +301,8 @@ typedef struct
    float f_reaction_target_time;  // time when enemy targeting starts
    
    float f_weaponchange_time;
+
+   float f_current_hearing_sensitivity;
    
    qboolean b_set_special_shoot_angle;
    float f_special_shoot_angle;
diff --git a/bot_combat.cpp b/bot_combat.cpp
index 2b88fc8..b14b4fa 100644
--- a/bot_combat.cpp
+++ b/bot_combat.cpp
@@ -794,6 +794,31 @@ edict_t *BotFindEnemyNearestToPoint(bot_t &pBot, const Vector &v_point, float ra
 }
 
 
+// called on every think frame
+void BotUpdateHearingSensitivity(bot_t &pBot)
+{
+   if (pBot.pBotEnemy != NULL)
+   {
+      // have enemy, use best hearing sensitivity for all
+      pBot.f_current_hearing_sensitivity = skill_settings[BEST_BOT_LEVEL].hearing_sensitivity;
+      return;
+   }
+
+   // reduce from best to worst in 3 sec
+   pBot.f_current_hearing_sensitivity -= (skill_settings[BEST_BOT_LEVEL].hearing_sensitivity - skill_settings[WORST_BOT_LEVEL].hearing_sensitivity) * pBot.f_frame_time / 3;
+   if (pBot.f_current_hearing_sensitivity < skill_settings[pBot.bot_skill].hearing_sensitivity)
+      pBot.f_current_hearing_sensitivity = skill_settings[pBot.bot_skill].hearing_sensitivity;
+}
+
+//
+float BotGetHearingSensitivity(bot_t &pBot)
+{
+   if(pBot.f_current_hearing_sensitivity < skill_settings[pBot.bot_skill].hearing_sensitivity)
+      return skill_settings[pBot.bot_skill].hearing_sensitivity;
+   return pBot.f_current_hearing_sensitivity;
+}
+
+
 //
 edict_t *BotFindVisibleSoundEnemy( bot_t &pBot )
 {
@@ -820,7 +845,7 @@ edict_t *BotFindVisibleSoundEnemy( bot_t &pBot )
       
       // is sound too far away? (bot cannot hear)
       float s_distance = (pCurrentSound->m_vecOrigin - pEdict->v.origin).Length();
-      if(s_distance > pCurrentSound->m_iVolume * skill_settings[pBot.bot_skill].hearing_sensitivity)
+      if(s_distance > pCurrentSound->m_iVolume * BotGetHearingSensitivity(pBot))
          continue;
 
       // more distant than what we got already?
diff --git a/bot_func.h b/bot_func.h
index 6ccda36..eef59b0 100644
--- a/bot_func.h
+++ b/bot_func.h
@@ -58,6 +58,7 @@ qboolean BotEdgeLeft( bot_t &pBot, const Vector &v_move_dir );
 
 qboolean BotUpdateTrackSoundGoal( bot_t &pBot );
 int BotGetSoundWaypoint( bot_t &pBot, edict_t *pTrackSoundEdict, edict_t ** pNewTrackSoundEdict );
+void BotUpdateHearingSensitivity(bot_t &pBot);
 
 void BotRemoveEnemy( bot_t &pBot, qboolean b_keep_tracking );
 qboolean BotLowHealth( bot_t &pBot );
diff --git a/bot_skill.h b/bot_skill.h
index f7ef9f6..8f696b3 100644
--- a/bot_skill.h
+++ b/bot_skill.h
@@ -4,6 +4,9 @@
 // bot_skill.h
 //
 
+#define BEST_BOT_LEVEL 0
+#define WORST_BOT_LEVEL 4
+
 typedef struct
 {
    int pause_frequency; // how often (out of 1000 times) the bot will pause, based on bot skill