HW9 - ECE 473/TAM 413 Homework Assignment#9 Due Friday...

Info icon This preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
ECE 473/TAM 413 Homework Assignment #9 Due: Friday, November 7, 2008 For your information Hour Exam 2: Thursday, November 20, 2008, 7:00-8:30 pm, 163 EL Hour exams are open book (the text for the course) with one sheet of notes (you can use both sides). Your class notes and lecture notes are not permitted. You can use calculators. 1. A baffled circular piston source with a radius of 10 centimeters operates in air (20˚C). a) For an operating frequency of 10 kHz, what is the distance to the far field? b) For an operating frequency of 1 kHz, what is the distance to the far field? c) For an operating frequency of 4 kHz, what is the zero-to-zero beamwidth? d) For an operating frequency of 8 kHz, what is the – 6 dB beamwidth? e) For an operating frequency of 10 kHz, what is the radiation impedance of the air acting on the piston? The answer should be nonzero values for both the real and imaginary parts. Express answer in rectangular form. f) For the piston source in part (e), what is the radiated acoustic power? The peak amplitude surface displacement is 100 micrometers.
Image of page 1
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern