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.
Results
Showing 1 to 6 of 6 for “"160 dB"”.
-
Direct numerical investigation and reduced-order modeling of 3-D honeycomb acoustic liners
… data for incident sound amplitude of 130 dB at frequencies from 1.5 kHz to 3.0 kHz. At amplitudes of 140 -- 160 dB the simulation impedance are in agreement with analytical predictions when using simulation-measured quantities, including the discharge coefficient and root-mean-square …
-
Lorentz actuators for turbulence control and underwater acoustic communications
… of a Lorentz Actuator, and was measured to be 160 dB at a frequency range from 1 kHz to 20kHz. This frequency range was limited by the driver electronics available at the time of testing, however we expect an actual range up to 100 kHz with our new equipment.
-
An Investigation of Active Tonal Spectrum Control as Applied to the Modern Trumpet
… of the implementation of two analog feedback controllers and two digital LMS controllers is performed. The model of the trumpet mechanics is studied to understand the trumpet system before applying the control systems. Analysis is performed on the type and the location of the acoustic …
-
Investigation into the use of high-efficiency switched-mode class E power amplifiers for high-dynamic range pulse-mode applications
… are sensitive to signals greater than 120 dB below the transmit power level, and correlated energy that exists during the receive time can cause serious system consequences. The Class E high-efficiency power amplifier is an attractive candidate for pulse-mode systems, but it is unknown if …
-
Modeling and Monitoring of Otolith Organ Performance in US Navy Operating Environments
… exposure of 240-320 Hertz underwater sound at 160 dB re 1 mPa for 10 days. No spontaneous primary position nystagmus, horizontal, vertical or torsional, was detected in any diver. This experiment was the first successful attempt to record and analyze eye movements underwater.
-
Design techniques for temperature insensitive, low phase noise oscillator
… a supply-regulated ring oscillator in a feedback loop that follows a frequency insensitive RC oscillator, which minimizes the frequency sensitivity to supply and temperature variations. The clock oscillator achieves negligible frequency variation against supply variation of 1.1 V to 1.3 V …