INTENSITY DLS AND MASKING IN NORMAL AND IMPAIRED HEARING
正常和听力受损的强度 DLS 和掩蔽
基本信息
- 批准号:3398327
- 负责人:
- 金额:$ 14.77万
- 依托单位:
- 依托单位国家:美国
- 项目类别:
- 财政年份:1983
- 资助国家:美国
- 起止时间:1983-12-01 至 1991-11-30
- 项目状态:已结题
- 来源:
- 关键词:auditory discrimination auditory feedback auditory pathways auditory stimulus cochlear lesion disease /disorder model hearing disorders hearing tests human subject loudness model design /development neural information processing noise perceptual maskings psychoacoustics psychometrics sound frequency speech
项目摘要
Our long-term objective is to reach an understanding of the
auditory system that will allow quantitative modeling of the
perception of tones, noise, and speech in both normal and
impaired hearing. Such models not only will improve our
understanding of normal auditory processes, but also will
significantly aid in providing better diagnostic tools for hearing
impairment and better rehabilitation of hearing-impaired
listeners. The proposed project aims to obtain some sorely needed
data and to continue testing the general concept that excitation
patterns may provide a framework for quantitative modeling of
normal and impaired hearing. Based on 21, 2AFC experiments in
normal listeners, impaired listeners, and listeners with
impairments simulated by masking a normal ear, the proposed
project will establish a firm psychoacoustic basis for refining our
excitation-pattern model of intensity discrimination and testing
several hypotheses related to this and other models. Our specific
aims are (1) To test two hypotheses stating how sensitivity, d',
depends on the level difference between two sounds being
discriminated by measurements of psychometric functions for
intensity discrimination, primarily in conditions with large DLs.
(2) To test the hypothesis that Weber's Law does not hold within a
single auditory channel. Intensity DLs as a function of level will
be measured for sounds whose excitation is limited by random-
level maskers to comprise a small number of auditory channels.
(3) To test the hypothesis that detection of tonal signals in noise
and intensity discrimination depends on similar decision rules and
employ an unweighted (non-optimal) sum of information from an
optimum selection of channels. Measurements of detection and
intensity discrimination of a 1-kHz tone and a 16-tone complex
will be made in fixed conditions and in conditions in which these
two types of signals are presented at random from trail to trial.
(4) To begin extending the model to account for discrimination of
sounds that vary over time. The manner in which the auditory
system can use excitation-level information over time will be
assessed through measurements of sensitivity, d', for intensity
discrimination as a function of stimulus duration. (5) The
hypothesis is that excitation-level information decreases over
time due to adaptation processes in the auditory system will be
tested in several experiments. Intensity DLs for multiple tone
bursts will be measured as function of number of the bursts and
the inter-burst interval. In other experiments, intensity DLs for
brief tones will be measured in the presence of a preceding,
adapting tone of various durations. (6) To further investigate the
processing of time-varying sounds and the flexibility of decision
processes, the release from masking caused by masker--envelope
fluctuations will be investigated in several experiments. These
data will significantly add to our knowledge of normal and
impaired auditory processing and will be important for the
development and testing of models of the auditory system.
我们的长期目标是达成对
听觉系统将允许定量建模
对正常和正常状态下的音调、噪音和言语的感知
听力受损。 这样的模型不仅会改善我们的
了解正常的听觉过程,但也会
显着有助于提供更好的听力诊断工具
听力障碍者的损伤和更好的康复
听众。 拟议的项目旨在获得一些急需的
数据并继续测试激发的一般概念
模式可以为定量建模提供框架
正常和受损的听力。 基于 21、2AFC 实验
正常听众、有障碍的听众、有障碍的听众
通过掩盖正常耳朵来模拟损伤,建议
项目将为完善我们的心理声学奠定坚实的基础
强度辨别和测试的激发模式模型
与该模型和其他模型相关的几个假设。 我们的具体
目标是 (1) 检验两个假设,说明敏感性 d' 如何
取决于两个声音之间的电平差
通过心理测量功能的测量来区分
强度歧视,主要是在 DL 较大的情况下。
(2) 检验韦伯定律在一定范围内不成立的假设
单一听觉通道。 强度 DL 作为级别的函数将
测量其激励受随机限制的声音
电平掩蔽器组成少量听觉通道。
(3) 检验噪声中音调信号检测的假设
和强度歧视取决于类似的决策规则和
使用来自一个未加权(非最佳)的信息总和
渠道的最佳选择。 检测测量和
1 kHz 音调和 16 音调复合音的强度辨别
将在固定条件和这些条件下进行
在每次试验中随机呈现两种类型的信号。
(4) 开始扩展模型以解释歧视
随时间变化的声音。 听觉的方式
随着时间的推移,系统可以使用激励电平信息
通过测量强度的灵敏度 d' 进行评估
歧视作为刺激持续时间的函数。 (5) 的
假设是兴奋水平信息减少
由于听觉系统的适应过程所花费的时间将是
经过多次实验测试。 多音调的强度 DL
突发将作为突发数量的函数来测量,并且
突发间隔。 在其他实验中,强度 DL 为
短音将在前面存在的情况下测量,
适应不同持续时间的音调。 (六)进一步查处
时变声音的处理和决策的灵活性
过程中,由masker--envelope引起的掩蔽释放
波动将在几个实验中进行研究。 这些
数据将显着增加我们对正常和
听觉处理受损,对于
听觉系统模型的开发和测试。
项目成果
期刊论文数量(0)
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会议论文数量(0)
专利数量(0)
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{{ truncateString('MARY S. FLORENTINE', 18)}}的其他基金
Intensity DLs and Masking in Normal and Impaired Hearing
正常和听力受损的强度 DL 和掩蔽
- 批准号:
6656066 - 财政年份:1983
- 资助金额:
$ 14.77万 - 项目类别:
INTENSITY DLS AND MASKING IN NORMAL AND IMPAIRED HEARING
正常和听力受损的强度 DLS 和掩蔽
- 批准号:
3398329 - 财政年份:1983
- 资助金额:
$ 14.77万 - 项目类别:
Intensity DLs and Masking in Normal and Impaired Hearing
正常和听力受损的强度 DL 和掩蔽
- 批准号:
6711113 - 财政年份:1983
- 资助金额:
$ 14.77万 - 项目类别:
INTENSITY DLS AND MASKING IN NORMAL AND IMPAIRED HEARING
正常和听力受损的强度 DLS 和掩蔽
- 批准号:
2125013 - 财政年份:1983
- 资助金额:
$ 14.77万 - 项目类别:
Intensity DLs and Masking in Normal and Impaired Hearing
正常和听力受损的强度 DL 和掩蔽
- 批准号:
6472515 - 财政年份:1983
- 资助金额:
$ 14.77万 - 项目类别:
INTENSITY DLS AND MASKING IN NORMAL AND IMPAIRED HEARING
正常和听力受损的强度 DLS 和掩蔽
- 批准号:
6124949 - 财政年份:1983
- 资助金额:
$ 14.77万 - 项目类别:
INTENSITY DLS AND MASKING IN NORMAL AND IMPAIRED HEARING
正常和听力受损的强度 DLS 和掩蔽
- 批准号:
3216033 - 财政年份:1983
- 资助金额:
$ 14.77万 - 项目类别:
INTENSITY DLS AND MASKING IN NORMAL AND IMPAIRED HEARING
正常和听力受损的强度 DLS 和掩蔽
- 批准号:
2837929 - 财政年份:1983
- 资助金额:
$ 14.77万 - 项目类别:
INTENSITY DLS AND MASKING IN NORMAL AND IMPAIRED HEARING
正常和听力受损的强度 DLS 和掩蔽
- 批准号:
3216034 - 财政年份:1983
- 资助金额:
$ 14.77万 - 项目类别:
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