# Visualizing Sound Directivity via Smartphone Sensors

## TL;DR

This paper introduces a smartphone app that automates the measurement and visualization of sound directivity patterns, making acoustic analysis more accessible and suitable for educational purposes.

## Contribution

It presents a novel, user-friendly method for sound directivity visualization using smartphone sensors and an adaptable microphone interface.

## Key findings

- Provides accurate visualizations of sound fields
- Compatible with various sound sources and devices
- Enables quick data collection for physics experiments

## Abstract

We present a fast, simple method for automated data acquisition and visualization of sound directivity, made convenient and accessible via a smartphone app, "Polar Pattern Plotter." 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 provide both a visual and quantitative representation of sound fields and device responses, adequate for introductory physics experiments.

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Source: https://tomesphere.com/paper/1702.06072