In this work, a flow reversal resonator fitted with a short-circuit duct connecting the inlet and outlet is analysed and used as a tuneable Continue reading
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Tag: Acoustics
Two Utilizations of Open Resonator Concept in Nondestructive Testing (Mechanical Project)
Two ways in which the concept of open resonator can be used in connection with nondestructive evaluation will be described.
In the first, a noncontact transducer’s efficiency of transferring energy into an object can be increased by Continue reading
Evaluation of COMSOL Multiphyscis for Rotordynamical Analysis (Mechanical Project)
Rotary machinery systems are widely used in different industries. As they have rotational movements, the resonances will be the function of rotational speed. Nowadays, there are different Continue reading
Linear Acoustic Modelling and Testing of Exhaust Mufflers (Mechanical Project)
Intake and Exhaust system noise makes a huge contribution to the interior and exterior noise of automobiles. There are a number of linear acoustic tools developed by institutions and industries to predict the acoustic properties of Continue reading
3-Axis Automated Probe Traverse for Aerodynamic Testing (Mechanical Project)
Our primary objective is to design, build, and test an automated traverse to hold measurement probes in Cal Poly’s low speed wind tunnel. The device should cause minimal flow disturbance. It’s movements must be able to Continue reading
Numerical Examination of the Nonlinear Dynamics of a Hybrid Acousto-Optic Bragg Cell with Positive Feedback under Profiled Beam Propagation (Electrical Project)
In standard weak interaction theory, acousto-optic Bragg analysis typically assumes that the incident light and sound beams are uniform plane waves. Acousto-optic Bragg diffraction with nonuniform profiled input beams is numerically examined under Continue reading
Acoustics of parallel baffles muffler with Micro-perforated panels (Mechanical Project)
Micro-perforated panels (MPP) have a good acoustic damping performance and a potential to be used in mufflers. This project aims to investigate the acoustic performance of a parallel baffles muffler, which consists of MPP baffles. The work is both experimental and Continue reading
Speaker That Uses the Non-linearity in Air to Create Sound (Mechanical Project)
The aim of this work was to investigate theoretically and experimentally the fact that it is possible to create sound by using the nonlinearity in air. A speaker was built verifying the theory that if at least two high frequencies at Continue reading
Embedding Data in an Audio signal, using Acoustic OFDM (Electronics Project)
The OFDM technology has been extensively used in many radio communication technologies. For example, OFDM is the core technology applied in WiFi, WiMAX and LTE. Its main advantages include Continue reading
Analytical and Numerical Analysis of the Acoustics of Shallow Flow Reversal Chambers (Mechanical Project)
Flow reversal chambers are mainly used to accomplish a compact silencer design needed on a vehicle. Generally in this configuration the inlet and outlet ports are on the Continue reading
Moment Balance Of An Axisymmetric Jet And The Effect Of Air Entrainment From Ambient (Mechanical Project)
The momentum flux of turbulent impinging jet is not conserved causing a transfer of momentum between the jet and its ambient, which may result in either increasing or decreasing the momentum flux of the jet. In order to study the nature of the momentum Continue reading