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myPerceptualAnalysis

September 11, 2009

1. Cello
http://www.freesound.org/samplesViewSingle.php?id=48028


anastasia,pitch,brightness,loudness,freesound

The pitch analysis shows the musical instrument’s ability to produce a single perceived pitch. Without vibrato, the cello note quickly stabilizes on a pitch with a deviation of less than 1 Hz throughout the note. When the string is released the sound begins to decay and we lose the pitch. The G2, the second lowest string on the instrument, has a relatively low average brightness of around 780 Hz, indicating that the instrument has a deeper, warmer sound. This corresponds to our common perception of the cello sound as rich and dark. The loudness also stabilizes throughout the bowing of the note.

2. Speech
http://www.freesound.org/samplesViewSingle.php?id=33711


anastasia,pitch,brightness,loudness,freesound

Unlike the harmonic sound of an instrument, all analyses of a clip of human speech showed sporadic jumps and much wider ranges within one spoken phrase. In this 2 second cross-section, pitch ranged from about 90 to 400 Hz, varying with the different vowel sounds, consonant sounds, and changes in inflection. This clip was of a female british english voice, showing a bright quality of sound but still with rapid changes ranging from 900 to 8500 Hz. It was interesting to note that loudness seemed to be a similar pattern varying almost exactly inversely with brightness.

–anastasia

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One Comment leave one →
  1. September 13, 2009 6:52 pm

    Very nice and clear descriptions and plots!!

    …xavier

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