Soundd: only update ambient db when not playing an alert (#30620)

* move to soundd + only when quiet

* not filtered
old-commit-hash: 5600a8288909e0b6ca95becbdb5746a0a9e35af4

system/micd.py

@@ -2,7 +2,6 @@
 import numpy as np
 
 from cereal import messaging
-from openpilot.common.filter_simple import FirstOrderFilter
 from openpilot.common.realtime import Ratekeeper
 from openpilot.system.swaglog import cloudlog
 
@@ -10,7 +9,6 @@ RATE = 10
 FFT_SAMPLES = 4096
 REFERENCE_SPL = 2e-5  # newtons/m^2
 SAMPLE_RATE = 44100
-FILTER_DT = 1. / (SAMPLE_RATE / FFT_SAMPLES)
 
 
 def calculate_spl(measurements):
@@ -50,15 +48,12 @@ class Mic:
     self.sound_pressure_weighted = 0
     self.sound_pressure_level_weighted = 0
 
-    self.spl_filter_weighted = FirstOrderFilter(0, 2.5, FILTER_DT, initialized=False)
-
   def update(self):
     msg = messaging.new_message('microphone', valid=True)
     msg.microphone.soundPressure = float(self.sound_pressure)
     msg.microphone.soundPressureWeighted = float(self.sound_pressure_weighted)
 
     msg.microphone.soundPressureWeightedDb = float(self.sound_pressure_level_weighted)
-    msg.microphone.filteredSoundPressureWeightedDb = float(self.spl_filter_weighted.x)
 
     self.pm.send('microphone', msg)
     self.rk.keep_time()
@@ -79,7 +74,6 @@ class Mic:
       self.sound_pressure, _ = calculate_spl(measurements)
       measurements_weighted = apply_a_weighting(measurements)
       self.sound_pressure_weighted, self.sound_pressure_level_weighted = calculate_spl(measurements_weighted)
-      self.spl_filter_weighted.update(self.sound_pressure_level_weighted)
 
       self.measurements = self.measurements[FFT_SAMPLES:]