Police Siren Analysis

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This presentation will give you an answer to an interesting question: "Why siren sounds so different?"
To relate the analysis to it, please visit http://deepaksharma1992.blogspot.in/2013/05/what-makes-sound-of-siren-so-different.html

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  • Higher frequencies tend to stimulate the inner hair cells present near the entrance of the basilar membrane. Whereas,
  • Higher frequencies tend to stimulate the inner hair cells present near the entrance of the basilar membrane. Whereas,
  • Higher frequencies tend to stimulate the inner hair cells present near the entrance of the basilar membrane. Whereas,
  • Higher frequencies tend to stimulate the inner hair cells present near the entrance of the basilar membrane. Whereas,
  • Police Siren Analysis

    1. 1. ?WHY SIREN SOUNDS SO DIFFERENTAttempt made to answer the qn. by: Deepak Sharma | Mohit Yadav
    2. 2. Introduction to CAST & CREW of the Presentation• Siren• Mic• Data Acquisition System• Open RoomEXPERIMENT SETUPAID FOR ANALYSIS• Audacity• Wavesurfer
    3. 3. HUMAN HEARINGPERCEPTION
    4. 4. LOUDNESS
    5. 5. SENSITIVITY TOHIGHER FREQUENCIES
    6. 6. PITCH PERCEPTIONPlace theory is a theory of hearing which states that our perception of sound depends on where each componentfrequency produces vibrations along the basilar membrane.
    7. 7. PITCH PERCEPTIONPlace theory is a theory of hearing which states that our perception of sound depends on where each componentfrequency produces vibrations along the basilar membrane.
    8. 8. PITCH PERCEPTIONPlace theory is a theory of hearing which states that our perception of sound depends on where each componentfrequency produces vibrations along the basilar membrane.
    9. 9. EXPERIMENTAL RESULTS
    10. 10. ANALYSIS OF A SIRENUSING A SUBTLECOMAPRISON
    11. 11. PITCH RESOLUTIONPlace theory is a theory of hearing which states that our perception of sound depends on where each componentfrequency produces vibrations along the basilar membrane.
    12. 12. FOURIER TRANFORMSPECTROGRAMPITCH CONTOURS(Please see the cover story forthem)
    13. 13. REFERENCES• http://hyperphysics.phy-astr.gsu.edu/hbase/sound/earsens.html• http://wikipedia.org• http://personal.cityu.edu.hk/~bsapplec/frequenc.htm• “Self Acoustics” by BeranekThank You
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