?WHY SIREN SOUNDS SO DIFFERENT

Attempt made to answer the qn. by: Deepak Sharma | Mohit Yadav

Introduction to CAST & CREW of the Presentation

• Siren

• Mic

• Data Acquisition System

• Open Room

EXPERIMENT SETUP

AID FOR ANALYSIS

• Audacity

• Wavesurfer

HUMAN HEARING PERCEPTION

LOUDNESS

SENSITIVITY TO HIGHER

FREQUENCIES

PITCH PERCEPTION

Place theory is a theory of hearing which states that our perception of sound depends on where each component frequency produces vibrations along the basilar membrane.

PITCH PERCEPTION

Place theory is a theory of hearing which states that our perception of sound depends on where each component frequency produces vibrations along the basilar membrane.

PITCH PERCEPTION

Place theory is a theory of hearing which states that our perception of sound depends on where each component frequency produces vibrations along the basilar membrane.

EXPERIMENTAL RESULTS

ANALYSIS OF A SIREN USING A SUBTLE

COMAPRISON

PITCH RESOLUTION

Place theory is a theory of hearing which states that our perception of sound depends on where each component frequency produces vibrations along the basilar membrane.

FOURIER TRANFORM

SPECTROGRAM

PITCH CONTOURS(Please see the cover

story for them)

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 Beranek

Thank You