Evaluation of a Binaural Beamformer (StereoZoom) in a Virtual Acoustic Environment and in Real Life
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 入组人数
- 4
- 试验地点
- 1
- 主要终点
- speech reception thresholds (SRT) assessment with audiological measures (BBF)
研究概览
简要总结
The goal of the study is to determine the benefit in speech intelligibility of the BBF and the MBF compared to an omni-directional microphone in different noise conditions. Secondary objective is to determine if there is a subjective preference for one of the microphone settings in different noise conditions.
详细描述
Study participants will be invited for two appointments. In the first appointment test will be performed inside the lab (lab measurements) and outside the lab (real life measurements) and in the second appointment test will be performed in the lab. In between appointments participants are asked to try the Naida CI Q90 at home and in their familiar surroundings for 2-4 weeks (home trial).
Lab measurements:
The Oldenburg Sentence Test will be used as speech signal to determine the speech reception threshold (SRT) for each background noise with an adaptive procedure. The overall level of the noise will be held constant while the level of the speech signal will be adapted depending on the words understood correctly for each sentence.
In addition to the objective speech intelligibility measurements the three microphone settings will also be assessed subjectively. For each background noise scenario the Oldenburg sentences will be presented successively from the frontal loudspeaker. The experimenter will switch between two programs on the participant's processor who then compares the two different microphone settings of these programs. Three paired comparisons will be performed: omni-directional vs. MBF, omni-directional vs. BBF and MBF vs. BBF. The comparisons will be made with regards to speech intelligibility, noise suppression and overall preference in each situation.
Real life measurements:
研究设计
- 研究类型
- Observational
- 观察模型
- Other
- 时间视角
- Prospective
入排标准
- 年龄范围
- 18 Years 至 80 Years（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •all participants, which signed the Informed Consent (Appendix Informed Consent Form)
- •severe to profound hearing impairment - bilaterally implanted with either the CII or HiRes90k cochlear implant devices
- •experience with their more recent CI at least three months
- •usage of the Naida CI sound processor on each ear for at least three months
- •ability for speech understanding in the presence of competing noise without any assistance from lip-reading
- •score: at least 20% correct for a sentence test delivered with an SNR of +10 dB, or an SRT of better (lower) than +15 dB
- •ability to give subjective feedback in a certain listening situation
- •first language: German or Swiss-German
- •if participants are recruited additionally from other clinics, ability to travel to Zurich
排除标准
- •Acute inflammation or pain in head-/neck area
- •Dizziness
- •Age of participants <18 years
- •Age of participants > 80 years
- •Any participant who is found to require substantial changes to their standard clinical program may be either excluded, or be asked to first get used to the new program before returning for the study test session.
结局指标
主要结局
speech reception thresholds (SRT) assessment with audiological measures (BBF)
时间窗: 10 months
The primary study outcome are speech reception thresholds (SRT) measured with BBF microphone setting
speech reception thresholds (SRT) assessment with audiological measures (omni)
时间窗: 10 months
The primary study outcome are speech reception thresholds (SRT) measured with omni-directional microphone setting
speech reception thresholds (SRT) assessment with audiological measures (MBF)
时间窗: 10 months
The primary study outcome are speech reception thresholds (SRT) measured with MBF microphone setting
次要结局
- paired comparisons assessment with scaling (speech intelligibility)(10 months)
- paired comparisons assessment with scaling (overall)(10 months)
- paired comparisons assessment with scaling (noise suppression)(10 months)