The Susceptibility of Speech to Noise
试验速览
- 阶段
- 不适用
- 状态
- Enrolling By Invitation
- 入组人数
- 200
- 试验地点
- 1
- 主要终点
- Percent words correct
研究概览
简要总结
The goal of this clinical trial is to establish how speech understanding is affected by background noise in people with normal hearing. The main questions it aims to answer are:
- Does noise affect speech understanding similarly in all frequency regions?
- Does adding noise cause speech understanding to fall away at a similar rate across frequencies?
Participants will listen to speech in different frequency regions, with noise added at various levels, and respond with the words that they hear.
详细描述
Participants will be seated comfortably throughout the experiment. Stimuli involving speech mixed with background noise at various levels will be played back from a PC and presented diotically over headphones at a level of approximately 65 dBA in each ear. Subjects will be instructed to repeat back each sentence, guessing if unsure. The experimenter will record component words correctly recalled. Sentences will not be repeated, and only exact-word matches will be accepted. A 10-minute practice stage will precede testing, in which subjects will hear example stimuli and sentences not used for testing. Test duration will not exceed two hours. Multiple groups of listeners will be employed, and the basic experimental protocol for each participant will be identical, differing only with regard to differences in the frequency content of the speech and/or the background noise present. Participants will be randomly assigned to groups.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Parallel
- 主要目的
- Basic Science
- 盲法
- Single (Participant)
入排标准
- 年龄范围
- 18 Years 至 70 Years（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •Age between 18 and 70 years
- •Native English speakers
- •No known history of cognitive impairment
- •No known history of hearing impairment
排除标准
- •Age under 18 or over 70 years
- •Non-native English speaker
- •Known history of cognitive impairment
- •Known history of hearing impairment
研究组 & 干预措施
Low-frequency region
Speech and noise filtered to the low frequencies
干预措施: Speech filtering (Behavioral)
Low-frequency region
Speech and noise filtered to the low frequencies
干预措施: Speech with background noise (Behavioral)
Mid-frequency region
Speech and noise filtered to the mid frequencies
干预措施: Speech filtering (Behavioral)
Mid-frequency region
Speech and noise filtered to the mid frequencies
干预措施: Speech with background noise (Behavioral)
High-frequency region
Speech and noise filtered to the high frequencies
干预措施: Speech filtering (Behavioral)
High-frequency region
Speech and noise filtered to the high frequencies
干预措施: Speech with background noise (Behavioral)
结局指标
主要结局
Percent words correct
时间窗: During a single listening session lasting not more than 2 hours
The percentage of words correctly heard and reported by the listener
次要结局
未报告次要终点