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Michael Forbes committed c047b5d

Indent reference. (Caused a problem on bitbucket overview page).

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 syntax: glob
 
+README.html
 *.pyc

README.html

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-<h1 class="title">Notch Filtering for Tinnitus Treatment</h1>
-
-<!-- -*- rst -*- -*- restructuredtext -*- -->
-<!-- This file should be written using the restructure text -->
-<!-- conventions.  It will be displayed on the bitbucket source page and -->
-<!-- serves as the documentation of the directory. -->
-<p>There is some <a class="reference external" href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0024685">clinical evidence</a> that notch filtering music can be useful for
-treating tinnitus.</p>
-<div class="section" id="tasks">
-<h1>Tasks</h1>
-<ol class="arabic">
-<li><p class="first">Determine the patient's frequency response.</p>
-<p>Provide a GUI for determining the patients frequency response.  The GUI
-should allow the user to adjust the amplitude of a sinusoidal signal of
-various frequencies until they can just barely hear it.  There should be a
-simple mode, where the system picks the frequencies, and the user simply has
-a single slider that they adjust, and a more advanced mode where the current
-response is displayed and can be adjusted.</p>
-<p>The end result of this is a list of frequencies and amplitudes defining the
-user's hearing threshold.  Note that the absolute value of the amplitudes
-will depend on the volume adjustment of the computer.  Repeating the test at
-a different volume setting should reproduce different results that can be
-brought into alignment by scaling. (This should be checked.)  It should also
-be independent of the headphone/speaker setup.</p>
-<div class="warning">
-<p class="first admonition-title">Warning</p>
-<p class="last">Poor quality sound systems and speakers/headphones can really
-muck this up. One should at least do an aliasing check such as suggested
-<a class="reference external" href="http://www.audiocheck.net/audiotests_aliasing.php">here</a>.  Playing the appropriate sound files should produce a continuously
-descending tone - any perception of ascending tones is due to aliasing
-artifacts from a cheap sound card.</p>
-</div>
-</li>
-</ol>
-<blockquote>
-<p>Finally, one should probably reproduce the test with various levels of
-background noise as the results are likely to depend on the presence of
-noise, and the resulting filter might want to be designed to take this into
-account.</p>
-<div class="note">
-<p class="first admonition-title">Note</p>
-<p class="last">Note that once this is established, the same setup can be used to
-test the quality of headphones.  Or a mic can be used, but the frequency
-response of the mic must also be established and removed.</p>
-</div>
-</blockquote>
-<ol class="arabic" start="2">
-<li><p class="first">Determine the patient's tinitus frequency, range, and intensity.</p>
-<p>This is more difficult to do accurately.  The patient will need to be able to
-adjust the frequency of the pitch and the amplitude.  To simplify the
-procedure, you might like to do this as a bisection search. &quot;Which sounds
-more like your tinnitus, A, B, or can't tell?&quot; where signals A and B have
-different pitch or different intensity.  This should be repeated several
-times, again with various noise backgrounds.</p>
-<p>The intensity should be determined relative to the patient's frequency
-response and must thus be done under the same conditions (volume setting,
-headphones etc.) as 1).</p>
-</li>
-<li><p class="first">Design the filter.</p>
-<p>The filter design should be fairly simple at this point.  Include a smooth
-overall gain to compensate for hearing loss, and provide a notch filter to
-compensate for the tinnitus.</p>
-<div class="warning">
-<p class="first admonition-title">Warning</p>
-<p class="last">Include a limit to the amount you amplify the signal by in the
-high-frequency region.  The patient's hearing loss may prevent them from
-hearing a large amplification at high frequencies, but it might still be
-damaging to their hearing.  (I have no evidence either way: it is just
-probably best to err on the side of caution here.)</p>
-</div>
-</li>
-<li><p class="first">Test the filter.</p>
-<p>Generate noise with a power level greater than or equal to the tinnitus
-strength in the tinnitus region.  Applying the filter to this noise should
-completely mask the tinnitus.  Lower amplitude noise should also mask the
-tinnitus, but maybe not completely.  (Though it might mask it completely.)</p>
-<p>Feedback could be obtained from the user at this point, adjusting the
-tinnitus location, width, and the noise background to refine the filter.  My
-guess is it will be easier for the user to answer &quot;With which sound do you
-hear less tinnitus: A or B?&quot; than the previous ones if the tinnitus almost
-vanishes in one of them.</p>
-</li>
-</ol>
-</div>
-<div class="section" id="fourier-analysis">
-<h1>Fourier Analysis</h1>
-<p>Our first task is to see the nature of a signal, so we can understand if the
-notch filter is working.  Note that simply applying an FFT to the full signal
-will produce a very noisy frequency spectrum.  The noise can be reduced by
-either smoothing, or applying a window</p>
-<!-- .................... .. -->
-<!-- References and links .. -->
-<!-- .................... .. -->
-</div>
-</div>
-</body>
-</html>
       descending tone - any perception of ascending tones is due to aliasing
       artifacts from a cheap sound card.
 
-__ http://www.audiocheck.net/audiotests_aliasing.php
+      __ http://www.audiocheck.net/audiotests_aliasing.php
 
    Finally, one should probably reproduce the test with various levels of
    background noise as the results are likely to depend on the presence of