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 7 of 7 for “"active noise cancellation"”.
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Optimal feedback control formulation of the active noise cancellation problem : pointwise and distributed
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1994.
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A feasibility analysis of single-sensor active noise cancellation in the interior of an automobile
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1995.
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Scaling IoT-based noise cancellation to multiple noise sources
… Internet-of-Things (IoT) sensing techniques with active noise cancellation (ANC) has demonstrated certain benefits over the conventional methods for ANC, including wideband cancellation without blocking the ear and non-causal adaptive filtering. These benefits, however, can only be observed in …
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Actively exploiting propagation delay for acoustic systems
… frequency (RF), and acoustics -- to improve active noise cancellation. By ""piggybacking"" sound over RF, our proposed system is able to compute anti-noise signals more precisely, and ultimately attain better cancellation performance. (2) We develop solutions that exploit the propagation …
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Evaluation of Military Hearing Protection Devices in a Simulated Aircraft Carrier Soundscape
… performance and subjective ratings, with several active HPDs outperforming passive devices in preserving situation awareness. Performance differences were environment-dependent, emphasizing the challenges of protecting hearing without degrading spatial awareness in noisy operational settings. …
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Multiple Reference Active Noise Control
The major application of active noise control (ANC) has been focused on using a single reference signal; the work on multiple reference ANC is very scarce. Here, the behavior of multiple reference ANC is analyzed in both the frequency and time domain, and the coherence functions are provided to …
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The Detection of Warning Signals While Wearing Active Noise Reduction and Passive Hearing Protection Devices
… thresholds changed when individuals wore an active noise reduction (ANR) hearing protection device (HPD), a passive HPD, or no HPD. An ANR earmuff, a passive earmuff, and a user-molded foam earplug were tested in two types of noises (pink and red) at two different noise levels (85 dBA and 100 …