Speech Analysis

Emotion detection using speech analysis by Nemesysco

Speech Analysis - Emotion detection using speech analysis by Nemesysco

SpeechTechMag.com: Nemesysco’s Voice Analysis Helps Detect Mental Stress

“Psycholosoft, a research group affiliated with the Department of Psychology at Japan’s Tsukuba University, determined that Nemesysco’s Layered Voice Analysis (LVA) technology is a reliable and valid tool for detecting mental stress through speech.

The study, conducted on a group of 106 healthy participants in Japan, found that LVA helps detect if an individual is under stress….”

via SpeechTechMag.com: Nemesysco’s Voice Analysis Helps Detect Mental Stress.

Please Read the Signal but Don’t Mention It: How Acknowledging Identity Signals Leads to Embarrassment

Marketing Division – Past Seminars 2010 | Sauder School of Business at UBC, Vancouver, Canada

Date: Friday November 5, 2010

Speaker: Young Jee Han, Marshall School of Business, University of Southern California – (Using Nemesysco’s QA5 emotion detection).

Abstract: This research investigates the dyadic interaction between the signaler and the recipient, in particular, how signalers respond when a signal is acknowledged by others. Consumers who use products as a form of identity signaling presumably want others to observe, recognize, and interpret their signals favorably. Consequently, if a recipient provides positive feedback, the signaler should feel pleased. However, my research shows that those who display more conspicuously branded goods – and thus, those trying harder to say something about themselves with their product choice – ironically become more embarrassed when others positively acknowledge their signal (i.e. pay them a compliment). Across three studies, this research documents how consumers of more conspicuously branded goods are more likely to feel embarrassed when paid a complement because they are more concerned with unexpressed judgments held by others. This effect is particularly strong for those people whose actual and ideal self differ highly.” …

via Marketing Division – Past Seminars 2010 | Sauder School of Business at UBC, Vancouver, Canada.

BBC – Future – Science & Environment – How hearing aids reveal the soundtrack of our emotions

Understanding what people with hearing implants can and cannot hear reveals the hidden subtexts within our everyday conversations.

Our sense of hearing is truly remarkable, all the more so when you understand the rich layers of information that exist within even a single spoken sentence. Of course this is something most of us take for granted, until you discover what life is like for people who don’t have the benefit of fully functioning hearing…”

via BBC – Future – Science & Environment – How hearing aids reveal the soundtrack of our emotions.

Amir Liberman


Amir Liberman was born in Jerusalem, Israel in 1972.

Amir Liberman on Time Magazine

Amir Liberman on the Lying Game

Amir is a worldwide leading researcher in the field of human voice analysis, and the first to identify the 3 basic sensations in the human voice: Excitement (positive sensation), Stress (negative sensation) and uncertainty (cognitive stress).

Amir began his voice analysis research in 1997, in response to a terror attack that took the life of 3 young mothers in Israel. His original intention was to build the “ultimate lie detector” based on speech analysis and other more common techniques of veracity assessment, but quickly changed the scope of his research to explore unique properties of the voice he identified in his preliminary test cases.

Liberman’s first voice related patent was published at 1998, summarizing a research of 2 years, leading the way to the development of the first ever commercial computerized emotion detector. His more recent discoveries and additional novel vocal parameters were published in his second voice analysis patent from 1999, identifying “Concentration”, “Anticipation” and “Arousal” (Also known as the “Love Detector” patent).

Amir Liberman on Speech Technology

Speech Technologies cover on Nemesysco Speech analysis

Amir Liberman was the first to address the different approach needed in assessing the apparent Rapport with a person, in contrast to his true underlying feelings – which cannot be done by the traditional phonetic measurements.

Being a self educated researcher, Liberman’s methods of research are very unique and unfamiliar to the world of traditional phonetics, as most of his research is done in real-life settings and not in a mocked laboratory atmosphere.

Amir formed Nemesysco, Ltd. in April of 2000, to manage all his IP rights and development projects. Since then, he has invested all his efforts and resources in perfecting and fine-tuning LVA technology and its applications for home-land security needs, fraud prevention solutions, call centers utilities and CRM applications.

In his most recent discovery to date (first published in 2005), Amir Liberman was the first to identify and classify “Anger”, “Happy” and “Upset”, 3 of the most critical emotions in call center settings. These identification techniques are considered a special secret know how of Nemesysco Ltd and are not disclosed in patents.


Amir Liberman lecture at TEDx Amsterdam

Amir Liberman – TEDx 2012

See more about Amir Liberman Speech analysis in the press.

(See Amir Liberman’s lecture at TEDx Amsterdam:
“Lies are told to change the future. To change the course of things to come…”)




“I believe most people are decent, and I know sometimes people lie to survive. I know that few will cheat because they choose so, to live off the backs of others. I do not accept anyone should tolerate this fraud, and I don’t agree with societies and financial firms that make you and I pay for the wrong doing of others. I choose fairness and justice above all.” (Amir Liberman, 2007)



Nemesysco’s Voice Analysis Technology Helps Detect Mental Stress (Forensics Talk)

“The current study examined the reliability and validity of Nemesysco’s Layered Voice Analysis technology and found that it can be useful for assessing stress from the human voice”, said Hirokazu Tachikawa, Chief Researcher of Psycholosoft research group. “The study conducted by the research group is of extreme importance to us, as it indicates that LVA technology can be used to reliably identify people suffering from stress.”

via Nemesysco’s Voice Analysis Technology Helps Detect Mental Stress (Forensics Talk).

Bank security news – Nemesysco’s HR1

“…CEO and Founder of Nemesysco, Amir Liberman commented, “We understand that hiring employees is an investment risk for any business and are excited to bring an affordable, flexible and accurate solution to the market. We aim to create a comfort zone for employers hiring new staff and have developed an application that can suit all businesses of all sizes around the world. No matter where you come from, what education or background you’ve had, you’re voice can still give away your true intentions”.

via : Bank security news.

(HR1 was recently updated and is now called LVA-i, please see www.lva-i.com to learn more)


The Journal of Finance Content Search


We measure managerial affective states during earnings conference calls by analyzing conference call audio files using vocal emotion analysis software. We hypothesize and find that, when managers are scrutinized by analysts during conference calls, positive and negative affects displayed by managers are informative about the firm’s financial future. Analysts do not incorporate this information when forecasting near-term earnings. When making stock recommendation changes, however, analysts incorporate positive but not negative affect. This study presents new evidence that managerial vocal cues contain useful information about a firm’s fundamentals, incremental to both quantitative earnings information and qualitative “soft” information conveyed by linguistic content.

via The Journal of Finance Content Search.