Phased Array Microphones

Project Overview 

Many applications require amplification of audio – large classrooms, music venues, theater production, film. Often, in these applications, complicated wired microphones or multiple expensive wireless systems are used. In either of these instances, system configuration is difficult and expensive. Within a phased array system, it is possible to use an array of centrally located microphones that can be tuned to amplify a targeted location based on the arrival of sound to the system. Such systems have been used in military applications (e.g. submarine detection). The goal of this project is to develop a low-cost system to be implemented in a classroom or theater setting to enable spotlight-style amplification of noise using a remote, phased array microphone system.

Objectives 

  1. Automate and Optimize Phased Array System Algorithm
  2. Innovate Hardware to Run Through Custom Analog to Digital Conversion Interface
  3. Run Data Analysis through Frequency & Sound Based Information

Major Tasks 

The major tasks of the project are outlined below. These are nominal and are likely to change somewhat throughout the course of the year. These are meant to illustrate the general nature of the work that the position entails.

  1. Use Python to Generate and Analyze Audio Signal Data  
  2. Test and Optimize Phased Array Algorithm   
  3. Develop Analog to Digital Audio Interface Preamplifier / Hardware 
  4. Analyze Live Demo Recordings Through Rigorous Testing  
  5. Design and 3D Print Chassis of Hardware and Microphone System

Preferred Skills and Interests

  • Good communication, writing, and presentation skills, punctuality
  • Excitement for research and development of larger goal-based objectives!
  • Python/Java/Misc Coding
  • Theater, performing arts, music
  • Arduino/PI/MCUs/FPGA
  • Microphonics/Ultrasonics/Piezoelectrics/Signals

How to Apply 

Applications will be reviewed by Dr. Gray and by continuing/former researchers from the team.  After a review of the application, our team will contact candidates to schedule a zoom screening interview.  Review for positions will be conducted either during Summer (for Fall on-boarding) or Winter (for Spring on-boarding). Please complete the MS Form, uploading the following deliverables; 

  • A brief (~1 page) essay or cover letter explaining which of the projects you are interested in, and why you think you might be a good fit for that project (or those projects).  If you are applying for multiple projects, extend your essay a little and describe your interest and qualifications for each position.  Be sure to let us know your major and where you are in your academic career (sophomore, junior, etc.) 
  • A resume outlining your work experience and education 

Please reach out to Dr. Gray (dagray3@vt.edu) if you have any questions or concerns.

 

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