Kevin W.

Key Skills

Software

Other

Top Subject Matter

Speech annotation for conversational English (phonetics, prosody, linguistics)

AI speech dataset annotation for conversational English (prosody, transcription)

Linguistic research annotation of spontaneous speech (phonetics and phonology)

Top Data Types

Audio

Top Task Types

Segmentation

Transcription

Freelancer Overview

Senior Speech Annotation Specialist — Stanford University. Brings 12+ years of professional experience across complex professional workflows, research, and quality-focused execution. Core strengths include Praat and Other. Education includes Master of Arts, University of California, Los Angeles (2015) and Bachelor of Arts, University of Texas at Austin (2013). AI-training focus includes data types such as Audio and labeling workflows including Segmentation and Transcription.

Labeling Experience

Senior Speech Annotation Specialist — Stanford University

AudioSegmentation

Annotated and segmented spontaneous conversational English speech datasets to support AI speech systems. Used Praat to validate pitch accents, intonational phrases, and speech boundaries. Reviewed waveform and spectrograms to improve segmentation and annotation quality. • Segmented speech boundaries and conversational units • Produced high-accuracy verbatim orthographic transcriptions (time-aligned) • Validated prosodic features such as pitch accents and intonation phrases • Performed quality assurance to maintain annotation consistency

2021 - Present

Speech Data Annotator & Transcription Specialist — Massachusetts Institute of Technology

AudioTranscription

Annotated natural conversational English speech for large-scale AI speech dataset development. Identified prosodic cues such as pauses, pitch resets, overlaps, and disfluencies to enhance ASR model training. Completed quality assurance reviews on transcription and segmentation outputs to ensure accuracy and consistency. • Labeled prosodic events (pauses, pitch resets, overlaps, disfluencies) • Produced and corrected time-aligned transcription and segmentation • Performed QA on labeled outputs • Trained junior annotators on Praat and annotation standards

2017 - 2020

Linguistic Research Assistant — University of California, Berkeley

OtherAudioTranscription

Supported linguistic research through preparation of annotated spontaneous speech corpora. Conducted phonetic transcription using IPA conventions and analyzed intonational phrase structures. Helped prepare datasets for speech science studies and research analysis. • Prepared annotated corpora for speech science studies • Analyzed intonational phrase structures in conversational recordings • Performed detailed phonetic transcription with IPA conventions • Assisted with annotation and preprocessing for research

2015 - 2017

Education

Work History