diff --git a/simgear/sound/sample.hxx b/simgear/sound/sample.hxx
index 366e4cad..a67524d7 100644
--- a/simgear/sound/sample.hxx
+++ b/simgear/sound/sample.hxx
@@ -181,6 +181,12 @@ public:
      */
     inline float get_humidity() { return _humidity; }
 
+    /**
+     * Get the pressure at the current altitude.
+     * @return Pressure in kPa
+     */
+    inline float get_pressure() { return _pressure; }
+
     /**
      * Test if static data of audio sample configuration has changed.
      * Calling this function will reset the flag so calling it a second
@@ -220,6 +226,7 @@ protected:
 
     float _reference_dist = 500.0f;
     float _max_dist = 3000.0f;
+    float _pressure = 101.325f;
     float _humidity = 0.5f;
     float _degC = 20.0f;
 
@@ -557,12 +564,15 @@ public:
 
     /**
      * Set both the temperature and relative humidity at the current altitude.
-     * @param temp Temperature in degrees Celsius
-     * @param hum Percent relative humidity (0.0 to 1.0)
+     * @param t Temperature in degrees Celsius
+     * @param h Percent relative humidity (0.0 to 1.0)
+     * @param p Pressure in kPa;
      */
-    inline void set_atmosphere(float temp, float hum) {
-        if (fabsf(_degC - temp) > 1.0f || fabsf(_humidity - hum) > 0.1f) {
-            _degC = temp, _humidity = hum; _static_changed = true;
+    inline void set_atmosphere(float t, float h, float p) {
+        if (fabsf(_degC - t) > 1.0f || fabsf(_humidity - h) > 0.1f ||
+            fabsf(_pressure - p) > 1.0f)
+        {
+            _degC = t, _humidity = h; _pressure = p; _static_changed = true;
         }
     }
 
diff --git a/simgear/sound/sample_group.cxx b/simgear/sound/sample_group.cxx
index f25699d4..d303dee5 100644
--- a/simgear/sound/sample_group.cxx
+++ b/simgear/sound/sample_group.cxx
@@ -302,7 +302,7 @@ void SGSampleGroup::update_pos_and_orientation() {
         sample->set_rotation( ec2body );
         sample->set_position(base_position);
         sample->set_velocity( velocity );
-        sample->set_atmosphere( _degC, _humidity );
+        sample->set_atmosphere( _degC, _humidity, _pressure );
 
         // Test if a sample is farther away than max distance, if so
         // stop the sound playback and free it's source.
diff --git a/simgear/sound/sample_group.hxx b/simgear/sound/sample_group.hxx
index 07aabd36..be63224d 100644
--- a/simgear/sound/sample_group.hxx
+++ b/simgear/sound/sample_group.hxx
@@ -198,11 +198,12 @@ public:
 
     /**
      * Set both the temperature and relative humidity at the current altitude.
-     * @param temp Temperature in degrees Celsius
-     * @param hum Percent relative humidity (0.0 to 1.0)
+     * @param t Temperature in degrees Celsius
+     * @param h Percent relative humidity (0.0 to 1.0)
+     * @param p Pressure in kPa
      */
-    void set_atmosphere(float temp, float hum ) {
-        _degC = temp, _humidity = hum; _changed = true;
+    void set_atmosphere(float t, float h, float p ) {
+        _degC = t, _humidity = h; _pressure = p; _changed = true;
     }
 
     /**
@@ -223,6 +224,7 @@ private:
     bool _changed = false;
     bool _pause = false;
     float _volume = 1.0f;
+    float _pressure = 101.325f;
     float _humidity = 0.5f;
     float _degC = 20.0f;