7.1.5 Generation of the impulse response list file

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Figure 7.3: ImpulseResponse ListFile generation screen

Generation Process

  1. Click the Impulse button on the working screen

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

    Overview of setting items

    • Spherical, Cylindrical
      Specify the coordinate system to use from the spherical coordinates or the cylindrical coordinates.
      If the spherical coordinate system is chosen, the elevation can be entered. If the cylindrical coordinate system is chosen, the height can be entered.

    • Distance [m]
      The horizontal distance between this speaker and the microphone.

    • Elevation [deg]
      The elevation angle seen from the microphone in the direction of the speaker.
      From the starting height, each elevation (whose interval is specified in the next item) is added to the template.

    • Height [m]
      The height seen from the microphone in the direction of the speaker.
      From the starting height, each height (whose interval is specified in the next item) is added to the template.

    • Azimuth [deg]
      Ending angle (left), starting angle (right).
      From the starting angle, in the counterclockwise direction, each angle (whose interval is specified in the next item) is added to the template.

    • Template File Name
      The place/name of the impulse response recorded file (flt format).
      When the spherical coordinate is chosen, it contains the strings "{AZIMUTH:%03d}", "{ELEVATION:%03d}", and "{CHANNEL:%02d}" in the file name. When the cylindrical coordinate is chosen, it contains the strings "{AZIMUTH:%03d}", "{ELEVATION:%03d}", and "{CHANNEL:%02d}" in the file name. These strings are replaced to the correspond values.

    • Channel List
      The channel number to use. If you select the channel to use, check the box and specify the number in comma-delimited format. If you use all channels, the box need not be checked.

    • Cut Index [sample]
      The starting and ending positions of sample used for generating transfer functions.
      Default of the start position need not be changed.
      The ending position is used to ignore (delete) the reflection, for example, in the case of the refraction being louder than the direct sound.

  3. Pushing the Create button on the bottom of the screen generates the Impulse Response List File and displays the contents of this file on the right side.

  4. Pushing the bottom-right Plot button displays the graph according to the input parameters.

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