Package org.noise_planet.noisemodelling.pathfinder.utils

Class AcousticIndicatorsFunctions

java.lang.Object
org.noise_planet.noisemodelling.pathfinder.utils.AcousticIndicatorsFunctions
public class AcousticIndicatorsFunctions extends Object
A utility class providing acoustic indicator functions for computations, including conversions between decibels and energy, summation and multiplication of arrays, and operations specific to octave bands.

  • Constructor Summary

    Constructors
    Constructor
    Description
    AcousticIndicatorsFunctions()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    static Integer[]
    asOctaveBands(int[] thirdOctaveBands)
    Create new array by taking middle third octave bands
    static Double[]
    asOctaveBands(Double[] thirdOctaveBands)
    Create new array by taking middle third octave bands
    static Integer[]
    asOctaveBands(Integer[] thirdOctaveBands)
    Create new array by taking middle third octave bands
    static double
    dBToW(double dB)
    Convert Decibel to Watt
    static double[]
    dBToW(double[] dB)
    Convert Decibel to Watt
    static double[]
    multiplicationArray(double[] array, double coefficient)
    Multiply component of two same size array
    static double[]
    multiplicationArray(double[] array1, double[] array2)
    Multiply component of two same size array
    static double
    sumArray(double[] energeticSum)
    Sum of all the components of this given list
    static double[]
    sumArray(double[] array, double number)
     
    static double[]
    sumArray(double[] array1, double[] array2)
    Element wise sum array without any other operations.
    static double
    sumArray(int nbfreq, double[] energeticSum)
    sum the first nbfreq values in a given array
    static double[]
    sumArrayWithPonderation(double[] array1, double[] array2, double p)
    Eq 2.5.9 The ‘long-term’ sound level along a path starting from a given point source is obtained from the logarithmic sum of the weighted sound energy in homogeneous conditions and the sound energy in favourable conditions.
    static double
    sumDbArray(double[] array1)
    Sum of all the decibel components of this given list
    static double[]
    sumDbArray(double[] array1, double[] array2)
    energetic Sum of two same size dB array
    static double[]
    twoDgtAftrComma(double[] valeurs)
     
    static double
    wToDb(double w)
    Convert Watt to Decibel
    static double[]
    wToDb(double[] w)
    Convert Watt to Decibel

    Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

  • Constructor Details

    • AcousticIndicatorsFunctions

      public AcousticIndicatorsFunctions()

  • Method Details

    • dBToW

      public static double dBToW(double dB)
      Convert Decibel to Watt
      Parameters:
      dB - Sound power spectrum in dB (or dBa , no weighting is done here)
      Returns:
      Watt value

    • dBToW

      public static double[] dBToW(double[] dB)
      Convert Decibel to Watt
      Parameters:
      dB - Sound power spectrum in dB (or dBa , no weighting is done here)
      Returns:
      Watt value

    • wToDb

      public static double wToDb(double w)
      Convert Watt to Decibel
      Parameters:
      w -
      Returns:
      Decibel value

    • wToDb

      public static double[] wToDb(double[] w)
      Convert Watt to Decibel
      Parameters:
      w -
      Returns:
      Decibel value

    • twoDgtAftrComma

      public static double[] twoDgtAftrComma(double[] valeurs)

    • sumArrayWithPonderation

      public static double[] sumArrayWithPonderation(double[] array1, double[] array2, double p)
      Eq 2.5.9 The ‘long-term’ sound level along a path starting from a given point source is obtained from the logarithmic sum of the weighted sound energy in homogeneous conditions and the sound energy in favourable conditions.
      Parameters:
      array1 - double array
      array2 - double array
      p - the mean occurrence p of favourable conditions in the direction of the path (S,R)
      Returns:

    • sumDbArray

      public static double[] sumDbArray(double[] array1, double[] array2)
      energetic Sum of two same size dB array
      Parameters:
      array1 -
      array2 -
      Returns:

    • sumDbArray

      public static double sumDbArray(double[] array1)
      Sum of all the decibel components of this given list
      Parameters:
      array1 -
      Returns:
      the sum in decibel

    • multiplicationArray

      public static double[] multiplicationArray(double[] array1, double[] array2)
      Multiply component of two same size array
      Parameters:
      array1 -
      array2 -
      Returns:

    • multiplicationArray

      public static double[] multiplicationArray(double[] array, double coefficient)
      Multiply component of two same size array
      Parameters:
      array - Array input
      coefficient - number to multiply at each index
      Returns:
      Array multiplied

    • sumArray

      public static double sumArray(int nbfreq, double[] energeticSum)
      sum the first nbfreq values in a given array
      Parameters:
      nbfreq -
      energeticSum -
      Returns:
      the sum value

    • sumArray

      public static double sumArray(double[] energeticSum)
      Sum of all the components of this given list
      Parameters:
      energeticSum -
      Returns:
      sum value

    • sumArray

      public static double[] sumArray(double[] array1, double[] array2)
      Element wise sum array without any other operations.
      Parameters:
      array1 - First array
      array2 - Second array
      Returns:
      Sum of the two arrays

    • sumArray

      public static double[] sumArray(double[] array, double number)

    • asOctaveBands

      public static Double[] asOctaveBands(Double[] thirdOctaveBands)
      Create new array by taking middle third octave bands
      Parameters:
      thirdOctaveBands - Third octave bands array
      Returns:
      Octave bands array

    • asOctaveBands

      public static Integer[] asOctaveBands(Integer[] thirdOctaveBands)
      Create new array by taking middle third octave bands
      Parameters:
      thirdOctaveBands - Third octave bands array
      Returns:
      Octave bands array

    • asOctaveBands

      public static Integer[] asOctaveBands(int[] thirdOctaveBands)
      Create new array by taking middle third octave bands
      Parameters:
      thirdOctaveBands - Third octave bands array
      Returns:
      Octave bands array