iPhone Screenshots

Description

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.

Instructions:
- 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

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

Information

Seller
Scott Hawley
Size
12.5 MB
Category
Utilities
Compatibility
Requires iOS 8.1 or later. Compatible with iPhone, iPad, and iPod touch.
Languages
English
Age Rating
Rated 4+
Copyright
© (c) 2016 Scott Hawley
Price
Free

Supports

  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

More By This Developer

You May Also Like