Table of Contents

ReadSoundSensor

The ReadSoundSensor function reads the sound pressure level (loudness) of the sound currently being 'heard' by the sound sensor (Note: Sound sensors are not included with the standard NXT kit)

The input parameter should be an NXT input port number between 1 and 4 (which the sound sensor is plugged into).

The mode parameter should be one of the following values: “DB” or “DbA” depending if you want the returned value in standard Decibels or A-weighted Decibels. 

spl = nxt.ReadSoundSensor( input, mode );

Example - Read sound level on port 1

function OnStart()
{
  nxt = app.CreateNxt();
  app.SetMenu( "Connect,Sound Level" );
}
 
function OnMenu( name )
{
  if( name=="Connect" )
    nxt.ShowDevices();
 
  else if( name=="Sound Level" )
  {
    spl = nxt.ReadSoundSensor( 1, "dB" );
    app.ShowPopup( spl );
  }
}