CONVERSPEECH LLC has been developing software and delivering R&D services since 1997. Located in Palo Alto, California, in the heart of Silicon Valley and headed by Colleen E Crangle, it has expertise in specialist computer technologies applied to problems that affect our world.
CONVERSPEECH LLC is a limited liability company registered in the state of California. For further enquiries about the company please use our Contact Form.

Our Team

David Gleeson, Associate, audio engineering

Michael McTear, Associate, spoken language technologies


Language Technologies

For computers to serve humanity adequately they must be able to work with human language. Only then will we have ...

  • computers that can analyze large collections of written text. From scientific articles and electronic health records to emails, twitter and chat streams, we encode our experience of the world in language.
  • a world of Connected Health, where bio-sensing technology and data analysis are complemented by accurate and sensitive human-machine communication
  • robots that understand spoken language put into service for the elderly and those needing physical aid

Data Technologies

Data derive from a variety of sources. Imperfect, mixed, varied, and inconsistent, data's first challenge is to accept its inherent messiness. The second challenge is to accept its uncertainties.

  • Automating the import of data from a variety of sources is often a necessity: OCR-ed data, annotated records, web data, sensor-based data, and crowdsourced text and categorical data. Such varied and error-prone sources frequently require cleaning, normalization and aggregation of the data.
  • Attitudinal data analysis gives insight into human emotions and attitudes. These essentially probabilistic human phenomena require predictive analysis at the level of the individual (how likely is someone to react in a certain way to specific events) and at the level of the group (how do people with this characteristic tend to behave).

Neurocomputational Technologies

The mind is this century's scientific frontier. Exploring it with intelligent use of technology will give us ...

  • brain-computer interfaces as communication aids
  • new tools for understanding language, emotion and the mind, yielding new information about human behavior

Why these technologies matters to society

These technologies have the potential to transform the way we solve social problems.

    Data derived from government and commercial sources, including social media sites, mobile phones and transaction data — are offering new ways to understand and predict human behavior. Can this potential be exploited for the good of society? What opportunities are presented by big data? What are the dangers?

  • Nowhere is the data problem more technically challenging than with text. Words, utterances, documents contain information vital to commerce, science, and public governance. The insights afforded by the analysis of large volumes of textual data are yet to be fully understood and appreciated.

  • Computational neuroscience is poised to give us the most significant window ever into the human mind and human behavior.


Projects in Health Science and Data Resources from the National Institutes of Health


Business case development and strategic technology assessment

Opportunities associated with natural-language processing (NLP), text data mining, speech and language technologies, cognitive neuroscience technology

Technology consulting and development

• Speech and conversational interfaces • Patient information systems • Consumer health education • Text data mining -- scientific literature, clinical trials, genomic databases, consumer data • Integration of heterogeneous knowledge sources -- WordNet, UMLS, Gene Ontology • Construction and management of ontologies and controlled vocabularies • Machine learning techniques • Information retrieval methods and evaluation • Natural language processing (NLP) and its applications