کتاب Li thwsis print official
تعداد صفحات : 148
نوع فایل : pdf
توضیحات :
This research investigates the impact of various types of cochlear hearing loss and masking noise
on the perception of basic speech sounds based on the information of identified speech cues. A
psychoacoustic method, named three-dimensional deep search (3DDS), is developed to identify the
perceptual cues of consonant sounds in natural speech. Unlike the conventional method of synthetic
speech, which requires a prior hypothesis about the acoustic cues to generate the speech stimuli,
the 3DDS measures the contribution of each subcomponent to speech perception as a function of
time, frequency and intensity, without making any tacit assumptions about the speech cues to be
identified. Using the 3DDS, we discovered that natural speech often contains conflicting cues that
are characteristic of confusable sounds. For instance, a normal /ka/, dominated by a mid-frequency
burst at 1–2 kHz, may also have an inaudible /ta/ burst above 3 kHz that promotes the /ka/→/ta/
confusion under noisy environments. Removal of the /ka/ burst may turn the sound into a solid
/ta/.
نقد و بررسیها
هنوز بررسیای ثبت نشده است.