Voice AI
CBT and Voice-Based Mind Check-ins
Voice AI10 min
CBT and Voice-Based Mind Check-ins
Change begins with noticing your thoughts. How can a short voice check-in help with that noticing?
SYMPLE JOURNAL
Read the changes within,
build better care.
Stories about Voice AI, digital mental health, and what we learn about the mind.
RESEARCH · PEOPLE · TECHNOLOGY
EDITOR'S PICK
Featured stories
Research & Insight
Korea's Voice AI Mental Health Landscape: Why This Field Is Growing Now
Research & Insight11 min
Korea's Voice AI Mental Health Landscape: Why This Field Is Growing Now
Employee mental health is shifting from a benefit to a question of organizational sustainability — and toward using voice and behavioral data.
LATEST STORIES
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Voice AI
Voice AI Mental Health Research: Where It Stands Now
Voice AI12 min
Voice AI Mental Health Research: Where It Stands Now
The idea of reading the mind through voice is old. Here is an unexaggerated account of what is promising and what remains unsolved.
Research & Insight
Early Detection of Employee Burnout: Signals, Methods, and Limits
Research & Insight13 min
Early Detection of Employee Burnout: Signals, Methods, and Limits
Burnout doesn't appear overnight. The real question is when the organization notices the change.
Voice AI
Voice Data Privacy and On-Device Processing
Voice AI11 min
Voice Data Privacy and On-Device Processing
The voice is as sensitive as it is a powerful signal. What you process, how far, and how becomes the starting point of trust.
Building SYMPLE
SYMPLE in the Media
Building SYMPLE6 min
SYMPLE in the Media
A factual, as-is summary of how SYMPLE and its two products have been featured in Korean media.
Voice AI
The Complete Guide to Voice Biomarkers: How the Voice Reveals the Mind
Voice AI14 min
The Complete Guide to Voice Biomarkers: How the Voice Reveals the Mind
Not what you say, but how you say it. The voice carries many signals that can connect to a person's state.
Building SYMPLE
Founding Story: From Yonsei University to Digital Mental Health
Building SYMPLE8 min
Founding Story: From Yonsei University to Digital Mental Health
SYMPLE began in order to build technology that notices change before you break down, not after.
Voice AI
Voice Stress Analysis: How It Is Used in Korea
Voice AI12 min
Voice Stress Analysis: How It Is Used in Korea
Not a ranking of specific companies, but an overview of the contexts in which the field of voice stress analysis is used in Korea.
Building SYMPLE
About SYMPLE: Technology That Notices Change Before People Break Down
Building SYMPLE9 min
About SYMPLE: Technology That Notices Change Before People Break Down
SYMPLE uses voice AI and digital mental health technology to notice small changes in people earlier.
Research & Insight
How to Scale Corporate Mental Care Without Counselors
Research & Insight11 min
How to Scale Corporate Mental Care Without Counselors
Acknowledging the limits of the counselor model, while scaling in a way that does not replace counseling.
Building SYMPLE
Duck's Dream: A Stress Recovery Routine App
Building SYMPLE8 min
Duck's Dream: A Stress Recovery Routine App
A stress recovery routine for everyday life, focused on recovery and care before you break down.
Engineering
How to Evaluate and Validate a Voice AI Model
Engineering13 min
How to Evaluate and Validate a Voice AI Model
You cannot trust a model on a single accuracy number. We lay out the essentials of validation, from data splitting, speaker generalization, and leakage prevention to false positives, fairness, and real-world robustness.
Building SYMPLE
Introducing KKEBI: Voice-Based Mind Care for Employees
Building SYMPLE9 min
Introducing KKEBI: Voice-Based Mind Care for Employees
With a short voice check-in, individuals reflect on their own state, while the organization sees only signals that can never identify a specific person.
Engineering
Voice Data Security and IRB Compliance
Engineering12 min
Voice Data Security and IRB Compliance
Voice is sensitive information. How do you obtain consent, how do you de-identify, and who gets access? We lay out the basic principles of research ethics and data security.
Research & Insight
Building a Burnout Metric with HR Analytics
Research & Insight12 min
Building a Burnout Metric with HR Analytics
How to understand depletion with data without surveilling individuals.
Voice AI
What Is Digital Phenotyping? The Concept Explained
Voice AI12 min
What Is Digital Phenotyping? The Concept Explained
A new science that seeks to measure behavior and mental states from the everyday traces left by smartphones and wearables.
Research & Insight
What Is Employee Well-being? The State and Direction of Korean Companies
Research & Insight11 min
What Is Employee Well-being? The State and Direction of Korean Companies
Why organizations have started to see well-being not as a perk event, but as a question of sustainability.
Engineering
From Voice to Analysis: Designing the Voice Processing Pipeline
Engineering13 min
From Voice to Analysis: Designing the Voice Processing Pipeline
Raw audio passes through several stages before it becomes a meaningful signal. We lay out the role and trade-offs of each stage, from capture to preprocessing, feature extraction, and modeling.
Research & Insight
Burnout Patterns Seen Through Anonymous Aggregation: PoC Insights
Research & Insight11 min
Burnout Patterns Seen Through Anonymous Aggregation: PoC Insights
Without identifying individuals, group-level flows say a great deal. But how you read them is everything.
Research & Insight
Why EAP Utilization Is Low and How to Raise It
Research & Insight10 min
Why EAP Utilization Is Low and How to Raise It
You rolled out a good EAP, so why is no one using it?
Engineering
KKEBI Architecture Overview: From Voice Check-in to Organizational Signal
Engineering12 min
KKEBI Architecture Overview: From Voice Check-in to Organizational Signal
How a single short voice check-in leads to personal self-understanding and organization-level signals. We lay out the full path the data travels, at the level of principle.
Voice AI
Can Voice Detect Burnout? Evidence and Limits
Voice AI12 min
Can Voice Detect Burnout? Evidence and Limits
Research linking voice with stress and depression has accumulated, but 'diagnosing burnout directly from voice' is not yet established.
Research & Insight
Comparing Organizational Stress Assessment Tools
Research & Insight12 min
Comparing Organizational Stress Assessment Tools
Surveys give a standardized photograph; continuous signals give a moving flow. The two are not competitors but complements.
Research & Insight
Predicting High-Performer Turnover: Signals and Data
Research & Insight11 min
Predicting High-Performer Turnover: Signals and Data
Can we really know in advance, from data, when a high performer will leave?
Research & Insight
7 Easily Missed Signs of Burnout
Research & Insight11 min
7 Easily Missed Signs of Burnout
The signals of burnout are not loud. They usually appear quietly, and in that person's own way.
Research & Insight
The Cost of Burnout: Lost Productivity and Talent Attrition
Research & Insight10 min
The Cost of Burnout: Lost Productivity and Talent Attrition
Why does burnout create larger costs where they can't be seen?
Research & Insight
Presenteeism vs. Absenteeism: The Invisible Cost
Research & Insight11 min
Presenteeism vs. Absenteeism: The Invisible Cost
The cost of not showing up is visible. The cost of showing up but not being able to work is not.
Voice AI
Can We Detect Stress in the Voice?
Voice AI14 min
Can We Detect Stress in the Voice?
When people are stressed, does the voice change too?
Research & Insight
Can Burnout Actually Predict Turnover?
Research & Insight12 min
Can Burnout Actually Predict Turnover?
Are employees with severe burnout really more likely to leave?
Research & Insight
Why We Study Burnout in Key Talent
Research & Insight14 min
Why We Study Burnout in Key Talent
Burnout does not start overnight. And resignation is rarely decided overnight either.