Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 14 of 14 for “"Pink Noise"”.
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Speech intelligibility in tracked vehicles and pink noise under active noise reduction and passive attenuation communications headsets
… headset systems, two passive and one with active noise reduction technology, were conducted. Nine listeners, six males and three females, responded to 180 50-word Modified Rhyme Word Lists presented under two noise conditions, two conditions of bilateral phase reversal of the speech signal, and …
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Intelligibility of synthesized voice messages in commercial truck cab noise for normal-hearing and hearing-impaired listeners
… of synthesized speech under a variety of noise conditions for both hearing-impaired and normal-hearing subjects. Modified Rhyme Test stimuli were used to determine intelligibility in four speech-to-noise (S/N) ratios (0, 5, 10, and 15 dB), and three noise types, consisting of …
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Azimuthal Localization and Detection of Vehicular Backup Alarms Under Electronic and Non-Electronic Hearing Protection Devices in Noisy and Quiet Environments
… for the effect of hearing protectors, background noise levels, and backup alarm acoustic features on listeners' abilities to localize backup alarm signals in the horizontal dimension, as well as on their ability to detect backup alarm signals in the distance dimension, is lacking in the acoustics …
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Determination of Backup Alarm Masked Threshold in Construction Noise
… protect the ear from harmful Masking noise while amplifying the sounds that need to be heard, such as backup alarms. Therefore, such devices should provide improved signal detection in noise when compared to their passive counterparts. The masked threshold of a vehicular backup alarm …
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Investigating the effects of oscillating sounds on the memory of older populations
… participants listened to amplitude modulated noise at 3, 4, 5, 6, and 7 Hz to determine which frequency within the theta band induced the strongest increase in theta power with respect to a pure noise control. Next, participants learned the locations of 30 objects via a spatial memory task …
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Predictive Control For Dynamic Systems To Track Unknown Input In The Presence Of Time Delay
… the designed predictive control system. Signal noise is quite a common phenomenon in practical control systems. Under the situation that the input signal is with measurement noise, low pass filter is designed to filter out the noise and keep the low frequency input signal. Two typical kinds of …
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Gender Differences in Auditory Perception of Pure Tone Frequencies and Speech Intelligibility via Bone Conduction Transducers
… the head (condyle and mastoid) at four levels of pink background noise (0 dB, 83 dB, 93 dB, and 103 dB). The performance measure used in this study was accuracy based upon responses to the Modified Rhyme Test (MRT), where accuracy was measured by the total number of target words identified …
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The effect of passive and electronic amplitude-sensitive hearing protectors on the detection of a warning signal
… to study earmuff wearers’ signal detection in noise performance and perceptions of comfort and acceptability with two amplitude-sensitive earmuffs as compared to their conventional counterparts. Passive and electronic amplitude-sensitive earmuffs were tested, represented by the EAR Ultra 9000 …
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Using signal detection theory to model the detection of warning signals in normal and hearing-impaired listeners while wearing hearing protection
… to detect an auditory alarm or warning in a high-noise environment while wearing an HPD. The research effort described herein was undertaken to determine how the ability to detect an alarm or warning signal changed for individuals with normal hearing and two levels of hearing loss as the levels of …
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Auditory-based processing of communication sounds
… from the filterbank output. However when pink noise was added to the stimuli, performance dropped more slowly as a function of signal-to-noise ratio when using the SAI-based AIM features, than when using either the filterbank-based features or the MFCCs, demonstrating the noise-robustness …
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Noise reduction during diffusion tensor imaging of infants
Acoustic noise produced during echo planar imaging (EPI) has been known to reach excessive levels. In addition to causing general patient discomfort and anxiety, this level of noise makes the scanning of young children and infants particularly difficult. Infants are typically scanned while sleeping …
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Evaluation of a Test Method for Assessing Horizontal Localization and Auditory Learning with Electronic Pass-through Hearing Protection
… in-the-ear HPED. Stimuli consisted of filtered pink-noise that differed in both duration and frequency. Frequencies ranged from 500-1000 Hz (low) and 3000-6000 Hz (high) and durations included 300 ms (short) and 3 seconds (long). Stimuli were presented at 60 and 70 dB SPL. AFFD measures were …
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Macroscopic insights from mechanistic ecological network models in a data void
… I find that realistic red-shifted environmental noise, and synchrony of species responses to noise, are associated with increased variability in ecosystem properties, with implications for predictive ecological modeling which usually assumes white noise. Next, I look at simultaneous species …
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Application of Wavelets to Filtering and Analysis of Self-Similar Signals
… wavelet transform. We also found that the SNR of noise filtering decreases as a frequency of the base signal increases up to the Nyquist limit for both the discrete and stationary wavelet transforms. Besides filtering the signal, the discrete wavelet transform can also be used to estimate the …