Polar Pattern Plotter 4+

Scott Hawley

    • 5.0 • 1 Rating
    • Free

iPhone Screenshots


Here is a fast, simple method for automated data acquisition and visualization of sound directivity, made convenient and accessible via a smartphone app. The app synchronizes measurements of sound volume with the phone's angular orientation obtained from either compass, gyroscope or accelerometer sensors and produces a graph and exportable data file. It is generalizable to various sound sources and receivers via the use of an input-jack-adaptor to supplant the smartphone's (omnidirectional) microphone. Results are fully adequate for introductory electro-acoustics experiments and demos.

- For horizontal rotations, select either the Compass or Gyroscope ("Gyro: Yaw", preferred) settings. For vertical rotations, use "Accel: Gravity."
- A "VU meter" bar is provided to check the input level
- When you press Start, the plot will begin at an angle of "0", which is assumed to be straight-on toward the center of the sound source.
- After pressing "Stop", you can adjust the dB value at the origin by moving the "dbMin" slider at the bottom of the screen.
- Using iTunes File Sharing, a .CSV file called "data.csv" is available, which includes a dump of the recent measurements, for use in exporting to other graphing & analysis programs, e.g. Excel.

Example measurements and further discussion will be available in a journal paper under submission with _The_Physics_Teacher_.

What’s New

Version 1.1

This app has been updated by Apple to display the Apple Watch app icon.

Extended frequency response to 20 kHz. (v1.0 rolled off around 5kHz.)

Ratings and Reviews

5.0 out of 5
1 Rating

1 Rating

Picky About Music ,

I love it.

So many uses for a musician and sound tech.

App Privacy

The developer, Scott Hawley, has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer’s privacy policy.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.

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