Evaluation of a Binaural Spatialization Method for Hearing Aids, in Terms of Speech Intelligibility, Speaker Localization and Subjective Preference.
试验速览
- 阶段
- 2 期
- 状态
- 已完成
- 发起方
- Sonova AG
- 入组人数
- 40
- 试验地点
- 1
- 主要终点
- Listener's Subjective Preference
研究概览
简要总结
This study investigates the possible benefits of using binaural spatialization techniques in digital wireless microphone systems for hearing aids. Speech intelligibility tests, speaker localization tests and preference tests are performed. The results of a diotic (current rendering) and a binaural (suggested rendering) rendering are compared.
详细描述
The signal processing laboratory (LTS2) of the Swiss Federal Institute of Technology (EPFL) has developed a new feature of sound rendering in hearing aids. This is a collaboration between EPFL and the Swiss company Phonak Communications AG. The new functionality works with the range of Roger products from Phonak, a new generation of FM systems that use a digital transmission.
FM technology refers to a type of wireless system that helps people better understand speech in noisy situations. FM systems commonly work together with a user's hearing aids, although systems are also available for those with otherwise normal hearing (such as people who suffer from APD, ADHD etc.). An FM system works like this: the person speaking wears or holds a transmitter microphone, or the transmitter is placed in the middle of the group (picking up speech from all around). Using harmless radio waves, the FM system sends speech signal(s) to the listener, who wears a tiny FM receiver behind the ear.
The new feature of such systems performs processing of the speaker's speech signal so that it renders information related to their spatial location. This so-called sound "spatialization" is a natural property of the human binaural auditory system, which allows us to localize sounds. However, this sound spatialization is not delivered by the current FM systems. Thanks to the new technology from EPFL and Phonak, it is now possible to include a binaural spatialization of the speech signal in the Roger product of Phonak hearing devices.
研究设计
- 研究类型
- Interventional
- 分配方式
- Non Randomized
- 干预模型
- Parallel
- 主要目的
- Supportive Care
- 盲法
- None
入排标准
- 年龄范围
- 18 Years 至 85 Years（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •French-native speakers and adults.
- •Normal otoscopy.
- •No conductive pathology.
- •Normal hearing, or moderate to severe, sloping or flat, symmetrical hearing loss.
- •User of bilateral Phonak hearing aids, for more than 6 months (hearing-impaired only).
排除标准
- •History of tinnitus or hyperacusis.
- •Visual impairment, after correction with glasses or not.
- •History of chronic or terminal illness or psychiatric disturbance,.
- •History of epilepsy or other reactions associated with the proximity to a video screen.
研究组 & 干预措施
Normal hearing
People showing no hearing loss (< 20 dB HL). Introduction of speech signal via the DAI of two hearing aids Phonak Naida IX SP.
干预措施: Hearing Aids (Device)
Moderate hearing impaired
Patients showing moderate hearing loss (40-60 dB HL).
Introduction of speech signal via the DAI of two hearing aids among:
PhonakAudéo V-13 Phonak Baseo Q-P, Q-SP, Q-M13 Phonak Bolero Q-P, Q-SP, Q-M13, Boléro V-P, V-SP Phonak Naida Q-CRT, Q-SP, Q-UP Phonak Sky Q-RIC, Q-SP, Q-UP, Q-M13 Phonak Ambra microP, SP, M H20 Phonak Cassia microP, SP, M H20 Phonak Dalia microP, SP, M H20 Phonak Naida S SP, S UP, S CRT Phonak Solana microP, SP, M H20 Phonak Certéna micro, Art M, Art P, Art SP, Art micro Phonak Exélia micro, Art M, Art P, Art SP, Art micro Phonak Milo Plus micro, Plus SP, Plus UP Phonak Naida SP, SP Junior, UP, UP Junior Phonak Nios micro, S H20 Phonak Versata micro, Art M, Art P, Art SP, Art micro
干预措施: Hearing Aids (Device)
Severe hearing impaired
Patients showing severe hearing loss (60-80 dB HL).
Introduction of speech signal via the DAI of two hearing aids among:
PhonakAudéo V-13 Phonak Baseo Q-P, Q-SP, Q-M13 Phonak Bolero Q-P, Q-SP, Q-M13, Boléro V-P, V-SP Phonak Naida Q-CRT, Q-SP, Q-UP Phonak Sky Q-RIC, Q-SP, Q-UP, Q-M13 Phonak Ambra microP, SP, M H20 Phonak Cassia microP, SP, M H20 Phonak Dalia microP, SP, M H20 Phonak Naida S SP, S UP, S CRT Phonak Solana microP, SP, M H20 Phonak Certéna micro, Art M, Art P, Art SP, Art micro Phonak Exélia micro, Art M, Art P, Art SP, Art micro Phonak Milo Plus micro, Plus SP, Plus UP Phonak Naida SP, SP Junior, UP, UP Junior Phonak Nios micro, S H20 Phonak Versata micro, Art M, Art P, Art SP, Art micro
干预措施: Hearing Aids (Device)
Profound hearing impaired
Patients showing profound hearing loss (> 80 dB HL).
Introduction of speech signal via the DAI of two hearing aids among:
PhonakAudéo V-13 Phonak Baseo Q-P, Q-SP, Q-M13 Phonak Bolero Q-P, Q-SP, Q-M13, Boléro V-P, V-SP Phonak Naida Q-CRT, Q-SP, Q-UP Phonak Sky Q-RIC, Q-SP, Q-UP, Q-M13 Phonak Ambra microP, SP, M H20 Phonak Cassia microP, SP, M H20 Phonak Dalia microP, SP, M H20 Phonak Naida S SP, S UP, S CRT Phonak Solana microP, SP, M H20 Phonak Certéna micro, Art M, Art P, Art SP, Art micro Phonak Exélia micro, Art M, Art P, Art SP, Art micro Phonak Milo Plus micro, Plus SP, Plus UP Phonak Naida SP, SP Junior, UP, UP Junior Phonak Nios micro, S H20 Phonak Versata micro, Art M, Art P, Art SP, Art micro
干预措施: Hearing Aids (Device)
结局指标
主要结局
Listener's Subjective Preference
时间窗: 1 day of the experiment
Listeners compare two audiovisual stimuli (diotic and spatialized) and Indicate their preference between binaural diotic (no spatialization), spatialized stimuli, or no preference. Results are given as the percentage of participant for the 3 possible answers in each group.
Speech Intelligibility
时间窗: 1 day of the experiment
Speech recognition score (%) For each group: average of the SRS over all subjects in the group. The SRS correspond to the number of understood words in a sequence of sentences (French HINT database) mixed with several level of masking noise (speech-shaped noise). Some are played diotically, the other are spatialized in various directions. The goal is to ensure that the spatialization processing does not degrade the understanding of the speech.
Speaker's Localization
时间窗: 1 day of the experiment
Localization error (in number of spatial sectors) For each group: average localization error over all subjects in the group. It is the difference between the actual spatial sector and the one reported by the listeners. There were 5 spatial sectors, and 9 possible locations. For instance: if the stimuli is played in sector 4, and the listener perceives it in 2, then the localization error is \|4-2\| = 2. The goal is to compare the localization error in 3 conditions: 1/ with no hearing aids (reference of natural localization) and no spatialization 2/ with hearing aids and standard fittings and no spatialization, and 3/ with spatialization applied.
次要结局
未报告次要终点