Acoustics & vibrations lab

ECTS: 4
Department: MP
Degree level: 2^nd year of Bachelor
Hours: 21h (6x3,5h) 
Instructor: Laure PETIT 

Learning objectives

Work on the mechanical and acoustic vibrations of a system:

• know the sensors;
• choose the signal acquisition and processing parameters;
• display spectrum;
• use a sound level meter or a microphone in order to work on a sound (sound level, frequencies);
• carry on vibration measurements with different sensors in order to determine the mechanical characteristics of a system (Young's modulus, modes);
• calculate regulatory indicators.

Course topics

Sensors, signal acquisition and processing in acoustics and vibrations

• Sensors : microphone, accelerometer, impact hammer.
• Signal acquisition and processing : octave, FFT, several software.

Acoustics

• Study of noise sources.
• Environmental acoustics.

Vibration mechanics

• Experimental modal analysis.
• Mechanical tests on a vibrating shaker.
• Extensometry.
• Vibration on humans.

Teaching method

• Practicals in pair.
• Writing reports about the experiment.

Assessment

• Interactions during the session.
• Lab notebook to fill in and writing of a report based on customer requests.
• Assessed hands-on.

Entry requirements

• Knowledge of Mechanics, Signal acquisition and processing.