Recent content by gh0st

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    Engineering How Do You Calculate Impedance in Filter Circuits?

    Homework Statement Homework Equations The Attempt at a Solution Hi all, i have some doubts on how to find the impedances for active filter circuits. Let's start with a simple low pass filter : http://img85.imageshack.us/img85/6484/52244578oo4.th.jpg The input impedance should be...
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    How Does Distance Affect Decibel Levels in Sound Propagation?

    Question 15. (a) Show that the difference in decibel levels, B1 and B2, of a sound source is related to the ratio of its distances, r1 and r2, from the receivers by B2 - B1 = 20 log (r1/r2) (b) A speaker is placed between two observers who are 110 m apart, along the line connecting them. If...
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