Designing modulation filters for improving speech intelligibility in reverberant environments
نویسندگان
چکیده
In this paper, we propose a new technique to design modulation filters to reduce degradation of speech intelligibility in reverberant environments. Using the inverse modulation transfer function, we design data-derived modulation filters for each speech frequency band. These filters preprocess speech signals between a microphone and a loudspeaker that radiates speech into a performance hall. Using our modulation filters, we conducted perceptual experiments with one hearingimpaired subject and two subjects with normal hearing. Test results indicate that our proposed method improves the intelligibility of reverberant speech.
منابع مشابه
Modulation enhancement of speech by a pre-processing algorithm for improving intelligibility in reverberant environments
Most listeners have difficulty understanding speech in reverberant conditions. The purpose of this study is to investigate whether it is possible to reduce the degree of degradation of speech intelligibility in reverberation through the development of an algorithm. The modulation spectrum is the spectral representation of the temporal envelope of the speech signal. That of clean speech is domin...
متن کاملIntelligibility enhancement of casual speech for reverberant environments inspired by clear speech properties
Clear speech has been shown to have an intelligibility advantage over casual speech in noisy and reverberant environments. This work validates spectral and time domain modifications to increase the intelligibility of casual speech in reverberant environments by compensating particular differences between the two speaking styles. To compensate spectral differences, a frequency-domain filtering a...
متن کاملModulation enhancement of speech as a preprocessing for reverberant chambers with the hearing-impaired
In this paper we report on a method for reducing the degradation of speech intelligibility in public halls caused severe reverberation. Hall reverberation makes speech more difficult to understand, particularly for the hearing-impaired. Our method involves processing the speech audio signal between a microphone and a loudspeaker that radiates the speech into the room. As there is a strong corre...
متن کاملEffects of suppressing steady-state portions of speech on intelligibility in reverberant environments
1. Introduction When listening to a lecture in a large auditorium it is often difficult to understand the speech. Among other factors, comprehension may be impaired by reverberation, which is sound reflecting from the wall, interfering with direct sound. Based on the modulation transfer function (MTF), the speech transmission index (STI) has been proposed as an objective measure for speech inte...
متن کاملRobust front end processing for speech recognition in reverberant environments: utilization of speech characteristics
This paper proposes two methods for robust automatic speech recognition (ASR) in reverberant environments. Unlike other methods which mostly apply inverse filtering by blindly estimated room impulse responses to achieve dereverberation, the proposed methods are based on the utilization of the characteristics of speech. The first method Harmonicity based Feature Analysis – takes advantage of the...
متن کامل