We think you have liked this presentation. If you wish to download it, please recommend it to your friends in any social system. Share buttons are a little bit lower. Thank you!
Presentation is loading. Please wait.
Published byNoelle Burroughs
Modified over 2 years ago
Chad, Jamal, Ryan
Chad Ostrowski Coursework/Interests Artificial Neural Networks & Learning Machines Analytical Modeling Usability Electrical Engineering & Engineering Science
Jamal Spearmon Coursework/Interests Satellite Comm. Systems RF Engineering Comm. Networks Electrical Engineering
Ryan Clothier Coursework/Interests Industry Quality Engineering Product Realization MOSFET Semiconductor Fabrication Lab Optics Electrical Engineering
Ultrasonic Directional Speakers
Problems Finding Transducers that operate in desired range Finding components that sample at the rate needed Generating the desired output Parts are cost prohibitive
Technical Update Conceptual Verification from Product Realization Use of Tweeters as opposed to Transducers Eliminated V/F ~ F/V block in design Stereo Signal Output produced by Matlab
Tech Specs -Tweeters- 70 [W] RMS per channel Rated @ 8 Ω ± 0.1% Signal to Noise Ratio – 99 dB Overall Frequency Response – 25 Hz to 40 KHz Input signal from soundcard - 175 mV
We Can Hear Ultrasound Beat Frequencies!
Matlab function this=noise(SecsOfPlay,FreqOfPlayLeft,FreqOfPlayRight) if nargin==2 FreqOfPlayRight=FreqOfPlayLeft; end Fs=FreqOfPlayLeft/.05; bits=SecsOfPlay*Fs; NumWavesLeft=.05*bits; NumWavesRight=FreqOfPlayRight*SecsOfPlay; t=linspace(0,bits,bits); y=zeros(bits,2); y(:,1)=sin(2*pi*NumWavesLeft*t); y(:,2)=sin(2*pi*NumWavesRight*t); sound(y,Fs)
Right Channel @ 18880 Hz
Left Channel @ 18000 Hz
Summary High directivity of sound Frequency shifted signal to hear beat freq Offering privacy in a congested world
Sound and the Codec Output On the DE2. Sound Sound is transmitted in air through compressions and rarefactions (stretches) of the air. This can be represented.
Properties of Sound waves
Audio Compression ADPCM ATRAC (Minidisk) MPEG Audio –3 layers referred to as layers I, II, and III –The third layer is mp3.
ECG Biopotential Amplifier ASHLEY MULCHRONE ZEXI LIU.
Think & Solve Problems Chapter 26
Photoreflectance of Semiconductors Tyler A. Niebuhr.
ENEL 583/589 Electrical, Computer, and Software Engineering In modern society, machinery is frequently used to make our lives simpler, and to help us carry.
Kyle Desrosiers (ME)- Team Lead Brad Fiedler (EE) Greg Wodzicki (EE) Chris VanWagenen (EE) George Slack- Faculty Guide P ACTIVE NOISE CANCELLATION.
1 Department of Electrical and Computer Engineering Advisor: Professor Zink Team Acoustic Beamformer Midway Design Review 11/25/2013.
Motivation Application driven -- VoD, Information on Demand (WWW), education, telemedicine, videoconference, videophone Storage capacity Large capacity.
LSU 06/04/2007Electronics 71 Analog to Digital Converters Electronics Unit – Lecture 7 Representing a continuously varying physical quantity by a sequence.
Sampling and quantization Seminary 2. Problem 2.1 Typical errors in reconstruction: Leaking and aliasing We have a transmission system with f s =8 kHz.
SYED SYAHRIL TRADITIONAL MUSICAL INSTRUMENT SIMULATOR FOR GUITAR1.
Dr. Holbert Dr. Holbert April 23, 2008
Spectrum Analyzer. Another Oscilloscope??? Like an oscilloscope Oscilloscope in time domain Spectrum analyzer in frequency domain (selectable)
Design Goal Design an Analog-to-Digital Conversion chip to meet demands of high quality voice applications such as: Digital Telephony, Digital Hearing.
Lecture 31 Electrical Instrumentation. Lecture 32 Electrical Instrumentation Electrical instrumentation is the process of acquiring data about one or.
1 Multimedia Systems 1 Dr Paul Newbury School of Engineering and Information Technology ENGG II - 3A11 Ext: 2615.
Lecture161 Instrumentation Prof. Phillips March 14, 2003.
Integrated Circuits Design for Applications in Communications Dr. Charles Surya Department of Electronic and Information Engineering DE636 6220
© 2018 SlidePlayer.com Inc. All rights reserved.