diff --git a/rpi/hardware/sound/sound.py b/rpi/hardware/sound/sound.py
index f23625d5..e377d46f 100644
--- a/rpi/hardware/sound/sound.py
+++ b/rpi/hardware/sound/sound.py
@@ -39,16 +39,17 @@ class SoundReader:
             self._subscriber(data)
 
     def _read(self):
-        measure_duration = 0.2
-        interval = 2
+        measure_iteration = 100
+        i = 0
         while self._running:
             level = 0
-            start = time.time()
-            while time.time() - start < measure_duration:
-                if GPIO.input(self._pin):
-                    level += 1
-            self._notify(f'{{"soundSensorValue": {level}}}')
-            time.sleep(interval - measure_duration)
+            if GPIO.input(self._pin):
+                level += 1
+            if i == measure_iteration:
+                self._notify(f'{{"soundSensorValue": {level}}}')
+                i = 0
+            i += 1
+            time.sleep(0.02)
 
 if __name__ == "__main__":
     sensor = SoundReader(pin=17)