Databases
StackOverflow2013
Postsdbo
PONaudio - Count the times audio level rises above a level
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PONaudio - Count the times audio level rises above a level
    primarykey
    data
    text
    <p>I'm pretty new to this so I'll try to explain as best I can. I want to count the number of times the audio level goes above a certain level. I have found/created some code which can detect if the level has gone above a certain threshold, but can't figure out how to count the number of times it has risen above that threshold reliably. the sound/noise is being created by a switch which is connected to the microphone, every time it switches a noise is created by the switching. Do I need to use some sort of filtering?</p> <p>C#.net Naudio Library Steve.</p> <pre><code> public void StartListening() { WaveIn waveInStream = new WaveIn(); waveInStream.BufferMilliseconds = 500; waveInStream.DataAvailable += new EventHandler&lt;WaveInEventArgs&gt;(waveInStream_DataAvailable); waveInStream.StartRecording(); } //Handler for the sound listener private void waveInStream_DataAvailable(object sender, WaveInEventArgs e) { bool result = ProcessData(e); if (result) { intCounter++; label1.Text = intCounter.ToString(); } else { //no peak in sound } } //calculate the sound level based on the AudioThresh private bool ProcessData(WaveInEventArgs e) { bool result = false; bool Tr = false; double Sum2 = 0; int Count = e.BytesRecorded / 2; for (int index = 0; index &lt; e.BytesRecorded; index += 2) { double Tmp = (short)((e.Buffer[index + 1] &lt;&lt; 8) | e.Buffer[index + 0]); Tmp /= 32768.0; Sum2 += Tmp * Tmp; if (Tmp &gt; AudioThresh) Tr = true; } Sum2 /= Count; // If the Mean-Square is greater than a threshold, set a flag to indicate that noise has happened if (Sum2 &gt; AudioThresh) { result = true; } else { result = false; } return result; } </code></pre>
    singulars
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PTQuestion
    1. USuser2547947
    1. USuser2547947
    plurals
    1. PL
      singulars
      1. LTLinked
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. COThe question should be related to programming, you should be more specific.
      singulars
      1. PONaudio - Count the times audio level rises above a level
      1. USmor
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload