Fundamentals of Aeroacoustics: RED - NAVAIR
- Overview
- Course Content
- Requirements & Materials
COURSE ID: DEF 1025P
Fundamentals of Aeroacoustics: RED - NAVAIR
Course Description
Aeroacoustics is the study of the generation of sound by unsteady airflow. It covers the sound generated by jets, fans, rotating blades, flow impingement, and any devices that interact with or introduce an unsteady motion of the air. This course will introduce the attendees to the following topics within the overall umbrella of aeroacoustics: basics of acoustics, acoustics terminology, sound metrics, manipulating decibels, wave propagation conducting high-caliber acoustic experiments, and the role of psychoacoustics.
TOPIC Basics of acoustics
· Jet flow/Jet instability
· Wave types and corresponding distance laws
TOPIC Wave propagation
· Simple noise sources
· Parametric dependence of aerodynamic noise
TOPIC Experiments and analysis
· Microphones
· Source location
Prerequisites
Required: Familiarity with solving basic partial differential equations.
Recommended: A basic course either in Fluid Mechanics or Thermodynamics
Materials
MATERIALS: Required (student must provide)
- Personal notebooks and pen
- A smartphone to download a free App for measuring noise spectrum
·MATERIALS: Provided (student will receive)
- A copy of the PowerPoint presentation
Session Details
Who Should Attend
People who:
- want to measure the noise of aircraft and any aero-machinery
- want to design quiet machinery and aerospace vehicles
- are involved in using commercial codes for predicting aircraft noise
- want to understand the role of high-level noise on jet mixing or separated flows
- want the noise to be used as a non-lethal weapon
- are involved in assessing noise impact on personnel including determining the performance of earplugs
What You Will Learn
- Definitions of Noise Units and how noise is measured
- Manipulating Decibels
- Wave equations and their use in understanding noise propagation in the open air, in rectangular, and cylindrical ducts
- Physics of Resonances, jet noise, cavity noise, impingement noise
- Basics of acoustic Signal processing and making accurate noise measurements
How You Will Benefit
- Understand how decibels are added and learn facts like why 0 dB plus 0 dB is not 0 dB; how masking works and how to make accurate noise measurements; how to develop empirical jet noise schemes; be introduced to various acoustic terms such as free field, geometric far-field, beamforming, PNL, PNdB, etc.
- Become familiar with how microphones work and what corrections are needed to produce accurate data and how to interpret noise spectra
- Understand how sound propagates in the open and in rectangular and cylindrical ducts and what produces resonances
- Understand how jet plumes develop and how they produce noise, both subsonic and supersonic jets
- Gain an understanding of how bomb bays screech and how impinging jets make loud whistles
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GTPE does not have a program for senior citizens. However, Georgia Tech offers a 62 or Older Program for Georgia residents who are 62 or older and are interested in taking for credit courses. This program does not pay for noncredit professional education courses. Visit the Georgia Tech Undergraduate Admissions page for more information on the undergraduate program and the Georgia Tech Graduate Admissions page for more information on the graduate program.
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