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Computational framework protects privacy in voice-based cognitive health assessments

March 15, 2025
in Health
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Digital voice recordings comprise beneficial data that may point out a person’s cognitive well being, providing a non-invasive and environment friendly technique for evaluation. Analysis has demonstrated that digital voice measures can detect early indicators of cognitive decline by analyzing options corresponding to speech price, articulation, pitch variation and pauses, which can sign cognitive impairment when deviating from normative patterns.

Nevertheless, voice information introduces privateness challenges as a result of personally identifiable data embedded in recordings, corresponding to gender, accent and emotional state, in addition to extra refined speech traits that may uniquely establish people. These dangers are amplified when voice information is processed by automated programs, elevating issues about re-identification and potential misuse of information.

In a brand new research, researchers from Boston College Chobanian & Avedisian College of Medication have launched a computational framework that applies pitch-shifting, a sound recording approach that adjustments the pitch of a sound, both elevating or decreasing it, to guard speaker id whereas preserving acoustic options important for cognitive evaluation.

By leveraging strategies corresponding to pitch-shifting as a method of voice obfuscation, we demonstrated the power to mitigate privateness dangers whereas preserving the diagnostic worth of acoustic options.”

Vijaya B. Kolachalama, PhD, FAHA, corresponding writer, affiliate professor of medication

Utilizing information from the Framingham Coronary heart Examine (FHS) and DementiaBank Delaware (DBD), the researchers utilized pitch-shifting at totally different ranges and included extra transformations, corresponding to time-scale modifications and noise addition, to change vocal traits to responses to neuropsychological checks. They then assessed speaker obfuscation through equal error price and diagnostic utility by means of the classification accuracy of machine studying fashions distinguishing cognitive states: regular cognition (NC), gentle cognitive impairment (MCI) and dementia (DE).

Utilizing obfuscated speech information, the computational framework was in a position to precisely decide NC, MCI and DE differentiation in 62% of the FHS dataset and 63% of the DBD dataset.

In response to the researchers, this work contributes to the moral and sensible integration of voice information in medical analyses, emphasizing the significance of defending affected person privateness whereas sustaining the integrity of cognitive well being assessments. “These findings pave the best way for growing standardized, privacy-centric pointers for future purposes of voice-based assessments in medical and analysis settings,” provides Kolachalama, who is also an affiliate professor of pc science, affiliate college of Hariri Institute for Computing and a founding member of the School of Computing & Knowledge Sciences at Boston College.

These findings seem on-line in Alzheimer’s & Dementia: The Journal of the Alzheimer’s Affiliation.

This mission was supported by grants from the Nationwide Institute on Getting old’s Synthetic Intelligence and Expertise Collaboratories (P30-AG073104 and P30-AG073105), the American Coronary heart Affiliation (20SFRN35460031), Gates Ventures, and the Nationwide Institutes of Well being (R01-HL159620, R01-AG062109, and R01-AG083735).

Supply:

Boston College College of Medication

Journal reference:

Ahangaran, M., et al. (2025). Obfuscation through pitch‐shifting for balancing privateness and diagnostic utility in voice‐based mostly cognitive evaluation. Alzheimer’s & Dementia. doi.org/10.1002/alz.70032.



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Tags: assessmentscognitivecomputationalframeworkHealthPrivacyprotectsvoicebased
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