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Transportation Noise—Airplane Noise Reduction
The Journal of the Acoustical Society of America, 1973Current Federal noise regulations will be discussed along with their impact on community noise exposure. Brief references will be made to specific technical areas where significant advances in noise reduction have been made and to noise reduction goals for the future.
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The Journal of the Acoustical Society of America, 2006
A noise reduction apparatus that reduces noise of intermediate to high range in a compartment of a vehicle. The apparatus comprises a source unit (1) that generates a reproduction signal, an ANC unit (2) that performs a signal processing to actively cancel the noise, a sensor (6) that detects information inside and outside the vehicle, an inside voice ...
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A noise reduction apparatus that reduces noise of intermediate to high range in a compartment of a vehicle. The apparatus comprises a source unit (1) that generates a reproduction signal, an ANC unit (2) that performs a signal processing to actively cancel the noise, a sensor (6) that detects information inside and outside the vehicle, an inside voice ...
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2000
In this chapter we will cover the area of theory and relevant experiments in the generation of squeezed states. Prior to discussing the parametric oscillator, we offer a brief introduction to non-linear optics and input-output theory. Finally, we will discuss other important experiments that generate squeezed states.
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In this chapter we will cover the area of theory and relevant experiments in the generation of squeezed states. Prior to discussing the parametric oscillator, we offer a brief introduction to non-linear optics and input-output theory. Finally, we will discuss other important experiments that generate squeezed states.
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The Journal of the Acoustical Society of America, 1989
Electronic circuitry as described which enhances the intelligibility of a speech signal corrupted by low-frequency noise while tending to retain frequency components of the signal characteristic of natural-sounding speech. The circuitry includes a broad band channel which passes the speech signal with little spectral distortion.
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Electronic circuitry as described which enhances the intelligibility of a speech signal corrupted by low-frequency noise while tending to retain frequency components of the signal characteristic of natural-sounding speech. The circuitry includes a broad band channel which passes the speech signal with little spectral distortion.
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AIP Conference Proceedings, 1996
Noise reduction is a problem being encountered in a variety of applications, such as environmental noise cancellation, signal recovery and separation. Passive noise reduction is done with the help of absorbers. Active noise reduction includes the transmission of phase inverted signals for the cancellation.
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Noise reduction is a problem being encountered in a variety of applications, such as environmental noise cancellation, signal recovery and separation. Passive noise reduction is done with the help of absorbers. Active noise reduction includes the transmission of phase inverted signals for the cancellation.
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The Journal of the Acoustical Society of America, 1992
When there is relative movement, at a speed above a critical value, between the trailing edge of a body, such as a hydrofoil or aerofoil section, and a fluid, the fluid flow tends to form a pattern of discrete swirling vortices. Vortex shedding at each side of the trailing edge alternately can cause resonance or "singing" of the section.
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When there is relative movement, at a speed above a critical value, between the trailing edge of a body, such as a hydrofoil or aerofoil section, and a fluid, the fluid flow tends to form a pattern of discrete swirling vortices. Vortex shedding at each side of the trailing edge alternately can cause resonance or "singing" of the section.
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2016
With a nonlinear RGB or LRGB image in hand, we now continue with post-processing. The degree of linear noise reduction applied previously (Chap. 12) will dictate how much nonlinear smoothing is required. As MultiscaleLinearTransform (MLT) does such an impressive job smoothing linear data, you may find that when sufficient signal has been collected ...
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With a nonlinear RGB or LRGB image in hand, we now continue with post-processing. The degree of linear noise reduction applied previously (Chap. 12) will dictate how much nonlinear smoothing is required. As MultiscaleLinearTransform (MLT) does such an impressive job smoothing linear data, you may find that when sufficient signal has been collected ...
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