document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=233487>Question 233487</A>: <I><SPAN STYLE=\"word-break: break-all;\"> How much louder is a mp3 player (100dB) to a crying baby (80dB)? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #172306 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=172306\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> How much louder is a mp3 player (100dB) to a crying baby (80dB)?<BR>\n" );
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document.write( "MP3 : 10log[mp3/Po] = 100dB<BR>\n" );
document.write( "log[mp3]-log[Po] = 10<BR>\n" );
document.write( "-------------------------------<BR>\n" );
document.write( "baby : 10log[baby/Po] = 80 db<BR>\n" );
document.write( "log[baby]-log[Po] = 8<BR>\n" );
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document.write( "Subtract the baby log equation from the mp3 log equation to get:<BR>\n" );
document.write( "log[mp3]-log[baby] = 2<BR>\n" );
document.write( "log[mp3/baby] = 2<BR>\n" );
document.write( "mp3/baby = 10^2 = 100<BR>\n" );
document.write( "mp3 loudness = 100*baby loudness<BR>\n" );
document.write( "======================<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );