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Digital noise cancelling stethoscope

Category: Hardware
Product Number: ADAU1850

We are designing a digital stethoscope with noise cancelling having two Digital MEMs microphones - one for listening to the Heart and lung sounds and one for the environment for noise cancellation. We need Audio codec with programmable DSP and headphone amplifier for the purpose. the ADAU1850 seems to be an overkill. Please suggest the appropriate part which fits the requirement. Shall we be needing a preamplifier like MAX9813H too in this case?