7.1.9 Generation of the localization transfer function file

• The localization transfer function file is a configuration file used in the LocalizeMUSIC module.

• This file is generated from the ImpulseResponse-ListFile or the TSP-ListFile, and from the MICARY-LocationFile.

Figure 7.8: Generation of the localization transfer function file

1. Click the Localization button on the working screen.

2. Input the parameters into the parameter input screen on the left side.

   Overview of setting items

   • Creation method
     Measurement-based method or geometry calculation method can be selected.
     If actually measured, measurement-based method should be selected.
     If geometry calculation method is selected, the transfer function is generated in simulations.

   • MicArray File
     Microphone location information file.
     Specify the file generated in section 7.1.7.

   • TSP/IR ListFile
     Specify the TSP response list file (see 7.1.6) or the Impulse response list file (see 7.1.5).

   • Sampling Rate [Hz]
     Sampling frequency of the transfer function.

   • FFT Length [sample]
     The number of bins in the discrete frequency expression of the transfer function.

   • TSP Length [sample]
     Specify the length of one recorded TSP signal, or the impulse response length.

   • Direct Sound Length [sample]
     The number of samples used in generating the transfer function.a

3. Pushing the Create button on the bottom of the screen generates the localization transfer function file and displays the contents of this file on the right side.

   

   Figure 7.9: Localization Transfer Function Display

   
   

   Output Screen

   Graphic representation can be displayed by double-clicking the plot on the output screen.
   

4. Graphic representation of the Mic Position Double-click the Plot next to the Mic Position in the frame on the right side.

   

   Figure 7.10: Graphic representation of Mic Position

5. Graphic representation of the Source Location
   Double-click the Plot next to the Source Location in the frame on the right side.

   

   Figure 7.11: Graphical representation of Source Location

   
   

6. Graphic representation of the Transfer Function
   If you double-click the Plot next to the Transfer Function in the frame on the right side, graph representation setting screen (see Figure 7.12) appears.
   Set the values using Overview of setting items below as a guide. Clicking the bottom-right PLOT button displays the graph.
   

   

   Figure 7.12: Transfer Function setting screen (Display Target tab)

   

   Figure 7.13: Transfer Function setting screen (Display Type tab)

   
   

   Overview of setting items

   ■ Display Target tab

   • Target data
     The type of graph to be displayed, choose one of the following three types:

     • Transfer function

     • Inverse Fourier Transform (Inverse FFT of Transfer function)

   • X-axis label
     Choose the X-axis label from among the following labels.

     • Frequency (When the target data is "Transfer function")

     • Time (When the target data is "Inverse Fourier Transform")

     • Sound Source Number

     • Num of Mic

     Display range of X-axis can be specified by Min and Max.
     If every value is to be displayed, these items need not be specified.
     Min : Minimum value to be displayed on X-axis
     Max : Maximum value to be displayed on X-axis

   • Y-axis label
     Choose the Y-axis label from among the following labels.

     • Frequency (When the target data is "Transfer function")

     • Time (When the target data is "Inverse Fourier Transform")

     • Sound Source Number

     • Num of Mic

     Display range of Y-axis can be specified by Min and Max.
     If every value is to be displayed, these item need not be specified.
     Min : Minimum value to be displayed on Y-axis
     Max : Maximum value to be displayed on Y-axis

   • Z-axis label
     Choose the Z-axis label from among the following labels.

     • Amplitude

     • dB

     • Phase

     Display range of Z-axis can be specified by Min and Max.
     If every value is to be displayed, these item need not be specified.
     Min : Minimum value to be displayed on Z-axis
     Max : Maximum value to be displayed on Z-axis

   ■ Display Type tab

   • Mic(or SRC or FREQ) index for display
     Select the number of microphone or source or frequency to be displayed.
     

   • Plot Parameter
     Select the style of the graph to be displayed.
     

     • Plot type (undefined, dots, points, lines, lines_points)

     • Surface (undefined, line, mesh)

     • Color Map (undefined, pm3d, pm3d map, pm3d at b)

   

   Figure 7.14: Transfer Function Graphic representation

7. To save the created file, use Save button on the bottom of screen.