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 20 of 188 for “"Background noise"”.
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Pattern recognition in the case of strong background noise
Dissertation submitted in compliance with the requirements for Maters Degree in Technology: Mechanical Engineering, Technikon Natal, Durban, South Africa, 2001.
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Background noise: Exploring the impact of listener multitasking on podcast advertising’s effectiveness
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2025-10-19 without embargo terms
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Sensory and cognitive contributions to speech perception in background noise in young adults
In the present study, speech perception in background noise was investigated by asking participants to perform listening tasks in two target speech contexts. Each target speech context was presented in four listening environments. External factors within each listening environment were manipulated, …
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Applications of fuzzy counterpropagation neural networks to non-linear function approximation and background noise elimination
… chaotic time series prediction and background noise elimination.
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Background Noise Reduction in Wind Tunnels using Adaptive Noise Cancellation and Cepstral Echo Removal Techniques for Microphone Array Applications
… were conducted to investigate Adaptive Noise Cancelling and Cepstrum echo removal post-processing techniques on acoustic data from a linear microphone array in an anechoic chamber. A point source speaker driven with white noise was used as the primary signal. The first experiment …
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Exploring the impact of dysphonia and background noise on elementary school children's listening comprehension and cognitive effort: a study of subjective and objective measures
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2025-02-04 without embargo terms
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Frequency, Attention, and Phonetic Characteristics that Influence the Right-Ear Advantage for Speech Perception
… attention instructions, filtering of stimuli, background noise, and phonetic properties of stimuli, viz., voice onset time (VOT) and place of articulation (POA). Participants heard monosyllabic rhyming words from the Halwes (1990) Fused Dichotic Word Test and were instructed to attend to the …
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A Derivation Of An Empirical Equation For Estimating The Acoustical Shadow Zone Length Of Roadway Noise Barriers
… acoustical shadow zone length (SZL) of roadway noise barriers. The acoustical shadow zone is the area behind a noise barrier of reduced sound levels, generally to some stated level at or near background. The ability to predict the SZL can be used as a method to evaluate the performance, and …
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Evaluation of medical alarm sounds
… the alarm sounds in the presence and absence of background noise and the results were compared. The presence of background noise did not have much effect on the correct identification rate. However, the confusion between the alarms sounds was significantly higher when background noise was …
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Age-Related Changes in Listening Effort for Various Types of Masker Noises
… have more difficulty understanding speech in background noise than younger listeners (e.g. Dubno et. al., 1984). Some have attributed this increased difficulty to peripheral hearing loss, while others suggest that older listeners may perceive listening in noise as difficult and effortful …
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Real-time detection of auditory : steady-state brainstem potentials evoked by auditory stimuli
… and the robustness of the detection against the background noise and unwanted artefacts.Two prominent state estimation techniques of Luenberger observer and Kalman filter have been used in the development of the autonomous ASSR detection scheme. Both techniques are real-time implementable, while …
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Development of Realistic Stimuli for the Evaluation of Listening Effort using Auditory Evoked Potentials
… often report difficulty perceiving speech in background noise, such as when listening in a restaurant. A common complaint of difficulty perceiving speech in noisy restaurants leads to the development of the present study, where audio recordings of connected discourse mixed with restaurant …
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Natural and Experimental Noise Affects Acoustic Communication in Songbirds
<p>Background noise is ubiquitous and can impair acoustic communication and influence signaling behavior in animals. Despite evidence demonstrating myriad effects of anthropogenic noise on animal communication, precisely how natural background noise influences communication and behavior remains …
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Closed-loop auditory-based representation for robust speech recognition
… is presented to address the problem of unseen noise for robust speech recognition. This closed-loop model is inspired by the possible role of the medial olivocochlear (MOC) efferent system of the human auditory periphery, which has been suggested in [6, 13, 42] to be important for human speech …
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Aircraft noise, overheating and poor air quality in London primary schools' classrooms
… and poor air quality as well as a high level of background noise during summer periods, due to the lack of ventilation. The main means of ventilation in majority of the UK schools is window. In noisy areas, the classrooms' occupants (i.e. pupils, teachers) often tend to shut windows especially …
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Neural speech tracking in quiet and noisy listening environments using naturalistic stimuli
… be masked with conflicting acoustics, including background noise from the environment or other competing talkers. The process of listening to one stream of sounds while ignoring background noise is referred to as the “cocktail party problem,” but its physiological basis remains poorly understood. …
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Model-Based Speech Enhancement
… a set of acoustic features using a harmonic plus noise model of speech. This is a significant departure from traditional filtering-based methods of speech enhancement. A major challenge with this approach is to estimate accurately the acoustic features (voicing, fundamental frequency, spectral …
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AN EXAMINATION OF CHANGES IN THE SOUND ENVIRONMENT AS MODULATORS OF THE HUMAN ACOUSTIC STARTLE RESPONSE IN CONTROL AND TINNITUS SAMPLES
… facilitated by embedding a startle stimulus in background noise, or inhibited by preceding the startle stimulus by a prepulse (PPI) or a gap in background noise (GPI). This series of three studies examined the efficacy of using silent gaps as prepulse inhibitors of the eyeblink component of the …
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MIMO MC-CDMA Systems over indoor optical wireless communication channels
… limitations of optical wireless systems include background noise attributed to natural and artificial light sources and multipath propagation. The former degrades the signal to noise ratio while the latter limits the maximum achievable data rate. This thesis investigates the use of transmit power …
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Speech denoising using nonnegative matrix factorization and neural networks
… with separating speech of a speaker from background noise as another source. So we deal with single-channel mixtures of speech with stationary, semi-stationary and non-stationary noise types. This is what we define as speech denoising. Our goal is to build a system to which we input a …
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