Gunjan PandeyHarini Sundararaman

Sudhanshu Vyas

OutlineObjectivesArchitectureDesign StagesIssues (Expected and Faced)ProgressFinal week targets

ObjectivesThe aim is to receive speaker's voice + noise at

both the microphone which are kept at a known distance and then try to make an estimate of noise using the microphone which is farther from the speaker.

The known information includes the x(t)+ n(t) value at M1 and x(t + ∆t1) + n(t + ∆t2) at the other microphone.

Current assumption is that both the microphones are far enough so that speaker's voice doesn't reach the microphone no 2

Architecture

Design Stages

Theory

Issues We Expected• Synchronization of the microphones• ADC• Position of noise source with respect

to the system• microphones characteristics• Level of Noise the system will be

able to handle• Proximity of the microphones wrt each

other

Additional Issues FacedNo tech support for AD1981BChip is in secondary mode on the ML507Doubt regarding two microphone supportMade a generic controller instead of specific

oneCustom debug methods

ProgressAssumed Actual

Study time Mid-NovemberArchitecture design Mid-NovemberImplementationBoard Testing

October 30th

November 14th

November 21st November 25th

November 29th December 3rd

Made AC'97 controller

Integrated with MP0 for testing

Read register values from AD1981B

Long way to go

Plans for last weekTest Implementation of register writesRemove UARTChange estimator algorithm

Questions