Understanding How People With Normal Hearing, Hearing Loss, or Cochlear Implants Recognize Speech Sounds in Context

What this Trial Is About

Researchers are investigating how people with normal hearing, hearing loss, or cochlear implants recognize speech sounds within the context of surrounding sounds. The study aims to understand how the frequency and timing of nearby sounds affect speech perception, especially under noisy conditions, and how these processes differ in listeners with hearing impairments. The research includes using computer models to simulate neural responses to speech sounds in context. Participants listen to speech played at comfortable volumes inside a sound booth and respond by identifying what they hear, either by speaking or choosing from options on a computer. The speech sounds are systematically modified in various ways, such as changing frequencies, speaking rates, or simulating hearing loss effects. These manipulations help researchers study how surrounding sounds influence speech recognition. Participants complete several testing blocks with breaks offered, and assignment to testing conditions is randomized. Throughout the study, participants provide responses at their own pace with minimal intervention. Researchers measure speech categorization and word recognition during testing, along with initial hearing assessments. The main outcome is how well participants identify speech sounds after these systematic manipulations. After completing all testing, participants are informed about the studys full purpose and findings. The study typically lasts about one year from enrollment to final data reporting.

Perception of Speech in Context by Listeners With Healthy and Impaired Hearing