Posts by David Liu
When AI Hears a Problem

Hidden away in our voices are signals that may hold clues to how we’re doing, what we’re feeling and even what’s going on with our physical health. Now, AI systems tasked with analyzing these signals are moving into healthcare.

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David Liu
Sonde Health and MassGen Selected for MassAITC Pilot Study to Examine Use of Voice in Remote Detection and Monitoring of Mild Cognitive Impairment

Sonde Health, a health technology company committed to bringing accessible health monitoring to everyone, in conjunction with the Massachusetts General Hospital (MGH) Frontotemporal Disorders (FTD) Unit, has been selected by the Massachusetts Artificial Intelligence and Technology Center for Connected Care in Aging & Alzheimer’s Disease (MassAITC) to lead a pilot study focused on leveraging vocal biomarkers for remote detection and monitoring of mild cognitive impairment in the home environment.

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David Liu
Our Series B fundraise

By David Liu, CEO Sonde Health December 8th, 2022

I am beyond excited to share the latest major milestone in Sonde’s journey to making preventive care possible through voice-powered health monitoring.


We have raised $19.25 million in Series B funding, led by Partners Investment, with NEOM Company and KT Corporation participating. Our existing investors, co-founder PureTech Health, M Ventures, MP Healthcare Venture Management, Neoteny and Evidity Health Capital all came back and invested in this round. 

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David Liu
Sonde Health Raises $19.25 Million Series B to Build the Next Generation of Voice-Based Health Monitoring

BOSTON – Dec. 8, 2022 – Sonde Health, a health technology company committed to bringing accessible health monitoring to everyone, has raised a $19.25 million Series B investment round led by Partners Investment, with participation from NEOM Company, KT Corporation, and existing investors, including co-founder PureTech Health and M Ventures. The company has raised $35.25 million in total and will use the funding to drive its global commercial growth, deepen its respiratory and mental health monitoring technologies, and build capabilities for additional health conditions.

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David Liu
Sonde Health Adds M3 Checklist to Its Mental Fitness Platform


Sonde Health, a leading enterprise vocal biomarker company, today announced that it has integrated the M3 Checklist into its Mental Fitness application programming interface (API), giving Sonde customers’ users access to a multi-conditional assessment tool that measures symptoms for major depression, bipolar disorder, anxiety disorder, and post-traumatic stress disorder (PTSD).

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David Liu
Sonde Health and Michigan State University Collaborate on Research Study to Assess the Impact of COVID-19 on Physical Activity and Mental Health in Africa

Sonde’s vocal biomarker technology to analyze ongoing mental and physical health challenges of people across four African countries during the COVID-19 pandemic

Sonde Health, in collaboration with Michigan State University, University of Botswana, University of Ghana, University of Dar es Salaam, and University of Nigeria, Nsukka, has launched a new study that uses vocal biomarkers to identify and understand the relationship among physical activity, mental health, and respiratory health of individuals living in Africa during the COVID-19 pandemic.

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David Liu
How vocal biomarkers are becoming a necessary tool for remote patient monitoring

Remote patient monitoring—using electronic devices to collect and record health and medical data in one location and having that data reviewed by a provider in another location—has become much more mainstream. RPM enables aging patients, individuals with chronic diseases and others to better manage their health remotely.

The Covid-19 pandemic has enhanced the use of RPM technology. But the real boom is still coming.

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David Liu
13 Most Popular Healthcare APIs for 2022

Like almost every other industry, Healthcare has undergone a Digital Transformation in the past decade. Health IT standards such as Consolidated-Clinical Document Architecture (C-CDA), Integrating the Healthcare Enterprise (IHE), Fast Healthcare Interoperability Resource (FHIR), Prescription Drug Monitoring Program (PDMP) have made digital access to health data for clinicians, patients, and researchers more collaborative and safer, and along with trends such as virtual care, AI, and automation, are helping to drive innovative treatments and cures.

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David Liu
Sonde Health’s New Tool Helps Monitor Mental Health Through Voice

Believe it or not, we’re almost two years into this pandemic, and it is taking a massive toll on America’s mental health. Recent data from the CDC found that more than 40 percent of adults in the U.S. have reported symptoms of anxiety or depression. Like any disease, these issues can have devastating consequences if they’re left untreated: An estimated 44,800 Americans lost their lives to suicide last year, making it among the leading causes of death here in the U.S..

Of course, this crisis has not been lost on the tech startup space. Popular apps like Spring Health, Ginger and Lyra Health have reeled in massive amounts of venture funding this year for their unique approaches…

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David Liu
Sonde launches voice API to detect mental illness

Sonde is looking to use vocal biomarkers to help evaluate mental wellness with its new API called Sonde Mental Fitness.

According to the company, health systems, employers and wellness service providers are able to tap into the API as a way to gather insights about their patients. The tool uses audio signal processing and machine learning to analyze 30-second audio clips of a user’s voice and detect any vocal changes that could be a sign of mental state.

The technology is able to transcribe and store the voice sample as daily diary entries. Users can then track their moods and emotions over time. The tool also offers health tips for mental wellness.

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David Liu