ECGR4122/5xxx Acoustics Fall 2020 Prof. Weldon: EPIC 2228, tpweldon@uncc.edu Do NOT contact instructor through canvas, use email only. Office hours: see my home page http://coefs.uncc.edu/tpweldon/ The course website is at http://coefs.uncc.edu/tpweldon/, listed under the "courses" tab at the top of the webpage. Resources for this course are also available in Canvas. Students must access the course website and Canvas modules for class notes, videos, links, and other materials. Textbooks: 1)Acoustics for Engineers: Troy Lectures, 2nd Ed. by Jens Blauert, Ning Xiang Free campus version (on campus vpn): https://www.springer.com/us/book/9783642033926 Amazn rental: http://www.amazon.com/ Other: - Acoustics. Beranek, L. L. (1954). United Kingdom: McGraw-Hill. -Acoustics: An Introduction to Its Physical Principles and Applications, A.D. Pierce, 1989,Acoustical Society of America Software (required on your personal computer): 1) you must be able to run maatlab and siimulink on your personal computer plus AudioToolbox https://www.mathworks.com/products/audio.html NOTE: SEE COURSE WEBPAGE FOR required maatlab version/release Download website is: https://www.mathworks.com/academia/tah-support-program/eligibility.html Hardware required (purchase for at-home projects/experiments) 1) Arctic S111 BT Mobile Bluetooth V4.0 Sound-System approx $10 https://www.amazon.com/gp/product/B00KS3XCTU 2) Bluetooth microphone Hybrid Course Format This course is intended to be delivered in a hybrid-synchronous format, but may go fully online as needed or as directed by the university. Components may be delivered online (through Canvas and the course website), and other parts should be conducted in the classroom, with social distancing guidelines applied. The hybrid component of this course is meant to provide students with some flexibility in their learning. The course is designed to engage students in a process of pre-class activities, in-class activities (face-to-face and simulcast), and post-class activities. All students are assigned asynchronous pre-class and post-class activities to work on online. The class is split into two groups. One group meets face-to-face on Tuesday and the other group meets face-to-face on Thursday. Each group of students attends a face-to-face class once a week while the other half views the class live online. All students are always attending synchronously, either in person or via online simulcast. In the event of all-online classes, it is likely that weekly or topical videos will be made available, and class-meeting time webex/etc sessions will be used for questions, quizzes, projects, etc. Any online, hybrid, or face-to-face class may be recorded, with copyright by Thomas P. Weldon, all rights reserved. Internet requirement: you will need reliable high-speed access. Exams may be open book and on canvas. Quizzes may or may not be announced. Grading: Exam1 30%, Exam2 30%, Homework/Quizzes/Projects/etc 40%. NOTE: instructor may change weights. Scale: 90-100 A, 80-89 B, 70-79 C, 60-69 D, with "curve," if any, entirely at the discretion of the instructor. See prior year projects, exams, handouts, quizzes on website. Collaboration (not copying) on homework and projects is encouraged. However, different project groups may NOT copy program code or report material. Class attendance and participation are expected. You must read the textbook; it is impossible to cover all material during class. The course will roughly follow the outline below; some key topics are noted in the tentative list below. Sequence Topic 1 Intro and Applications of acoustics 1.0-1.3 Music, ultrasound, noise, seismology, sonar, etc. 2 Basics 1.4-1.7 Sound pressure, velocity, frequencies, dB, musical scales 3 Ch 2 Mechanical resonance 2.0-2.5 Undamped and damped Mass+spring, mechanical impedance 4 Ch 3 Electrical analogs 3.0-3.7 RLC equivalents of mechanical oscillators 5 Ch 7 Electric waves 7.0, LC lines, telegrapher equations, wave equations 6 Ch 7 Mechanical and Acoustic Waves 7.1, 7.3, 7.4 Acoustic transmission line and acoustic waves 7 Exam 1 8 Strings Transverse waves on strings 9 Fourier Frequency content of acoustic signals 10 Ch 7 Reflection 7.5, 7.6, 8.6 Reflection coefficient, standing waves 11 Ch 9 3D waves and Acoustic radiation 7.2,9.1-9.6 3D wave equation, monopoles, dipoles, arrays 112 Ch10-12 Acoustic boundaries, other topics TBD Diffraction, reflection, refraction, room acoustics 13 Review 14 Exam2 (typically during next-to-last week of classes) 15 Final project reports Final Exam See Video Presentation and Review below Video Presentation and Peer Reviews (subject to change): Topic TBD ( ). Every group must upload a 5 minute optionally-anonymous video of a presentation on/before 5 PM of the night before the scheduled final exam, so that all videos will be ready online for peer review during the scheduled final exam meeting time. In addition, a pdf of the presentation slides must be emailed to the instructor by the same deadline (as a backup in case of video technical difficulties). As an online final examination class session, each individual student must view randomly assigned videos during the final exam period, and/or take an online quiz at instructor discretion. The video and reviews will be worth approximately one project. Excused absence makeups: May be scheduled for the last class period. Makeups will usually cover cumulative course material. COVID-19 Protection: It is the policy of UNC Charlotte for the Fall 2020 semester that as a condition of on-campus enrollment, all students are required to engage in safe behaviors to avoid the spread of COVID-19 in the 49er community. Such behaviors specifically include the requirement that all students properly wear CDC-compliant face coverings while in buildings including in classrooms and labs. Students are permitted to remove face coverings in classroom or lab settings only when the instructor explicitly grants permission to do so (such as while asking a question, participating in class discussion, or giving a presentation) and while at an appropriate physical distance from others. Failure to comply with this policy in the classroom or lab may result in dismissal from the current class session. If the student refuses to leave the classroom or lab after being dismissed, the student may be referred to the Office of Student Conduct and Academic Integrity for charges under the Code of Student Responsibility. Students are expected to attend every class and remain in class for the duration of the session when it is safe to do so in accordance with university guidance regarding COVID-19. Failure to attend class or arriving late may impact your ability to achieve course objectives which could affect your course grade. An absence, excused or unexcused, does not relieve a student of any course requirement. Regular class attendance is a studentís obligation, as is a responsibility for all the work of class meetings, including tests and written tasks. Any unexcused absence or excessive tardiness may result in a loss of participation points. Students are encouraged to work directly with their instructors regarding their absence(s). For absences related to COVID-19, please adhere to the following: - Do not come to class if you are sick. Please protect your health and the health of others by staying home. Contact your healthcare provider if you believe you are ill. - If you are sick: If you test positive or are evaluated by a healthcare provider for symptoms of COVID-19 www.cdc.gov/coronavirus/2019-ncov complete this form https://forms.gle/BAH4efQ8xab3ickJ7 to alert the University. Representatives from Emergency Management and/or the Student Health Center will follow up with you as necessary, and your instructors will be notified. - If you have been exposed to COVID-19 positive individuals and/or have been notified to self-quarantine due to exposure, complete this form https://forms.gle/BAH4efQ8xab3ickJ7 to alert the University. Representatives from Emergency Management and/or the Student Health Center will follow up with you as necessary, and your instructors will be notified. To return to class after being absent due to a COVID-19 diagnosis or due to a period of self-quarantine, students should submit an online request form https://sass.uncc.edu/services/absence-verification to Student Assistance and Support Services (SASS). Supporting documentation can be attached directly to the request form and should be from a student's health care provider or the Student Health Center, clearly indicating the dates of absences and the date the student is able to return to class. Instructors will be notified of such absences. If you are absent from class as a result of a COVID-19 diagnosis or quarantine, the instructor will try to help you continue to make progress in the course, and work with you to determine the best course of action. The final decision for approval of all absences and missed work is determined by the instructor. If you miss an exam/quiz for any reason, you will receive a grade of zero (exceptional circumstances must be documented and/or approved by the instructor at least 24 hours prior to the exam). Any special exam or project accommodation request should be made no later than the class meting one week before the exam or project. Frequent absence from class or labs may result in a severe grade reduction. Late projects will not be accepted, and/or may be penalized up to 30 percent per day, solely at the instructor's discretion. Absence from class sessions or internet session may result in grade reduction. The instructor is free to assign students to any project group at any time. Appeals regarding final grade must be communicated to instructor within 14 days after end of semester, since any residual materials may be destroyed thereafter. Departure from classroom or internet during any quiz or exam will result in a grade of zero. Students are responsible for submitting all forms to Disability Services, and must provide a notice of accommodation from Disability Services in the first week or two of the semester (see their office for more information). Audio or video recordings are not permitted, and all course content are copyright by Thomas P. Weldon. If any recording is permitted in writing, such recording remains copyright by Thomas P. Weldon and shall not be distributed. NOTE: Final grading may include a subjective component, at instructor discretion, based on the above rough weightings PLUS the instructor's overall evaluation of student performance in projects and class participation. This syllabus contains the policies and expectations established for this course. Please read the entire syllabus carefully before continuing in this course. These policies and expectations are intended to create a productive learning atmosphere for all students. Unless you are prepared to abide by these policies and expectations, you risk losing the opportunity to participate further in the course. It is the responsibility of the student to be familiar with the academic regulations, degree requirements, religious accommodation for students, course requirements, and all other requirements, policies, and procedures set forth in the current University Catalog and all University Policies. The official university guidelines supersede any contradictions that may exist in this handout. Violations may result in reduction of grades, zero grade, fines, suspension, course failure, or other adverse consequences. In addition, a proper classroom environment is expected by all students, and therefore any disorderly or disruptive conduct or other negative impacts on the classroom, solely at the instructor's discretion, will result in expulsion from such class with a grade of zero for corresponding material, and/or other adverse sanctions as may be deemed appropriate. Use of computers, tablets, phones, etc. during class are disruptive to class. If there are any issues or problems within a group, students must follow the Project Problem Resolution Guidelines provided on the course website. The course policies set forth in this syllabus may be modified at any time by the course instructor. Notice of such changes may be by announcement in class and/or by email to the student's UNCC email address. ALL STUDENTS MUST MEET PREREQUISITES AND COREQUISITES FOR THIS COURSE as published in the UNCC Catalog which supersedes this syllabus. Prerequisite: ECGR 3111 with a grade of C or better Engineering major or minor Corequisite: Prerequisite or corequisite: Graduate Extra Project (Graduate level only, 5000 level) worth 10% of total homeworks/quizzes/projects grade. The following is a preliminary description, details may change later in semester.
Graduates demonstrate their project to the instructor by submitting A 4-page technical report by email to the instructor on the last day of class. Grades will be determined by the technical quality including clarity of presentation. In such a short report, it is essential that you present only the most important details. Graduate projects (preliminary description): TBD: simulate and report on an acoustic metamaterial