Mechanisms of broadband noise generation on metal foam edges
نویسندگان
چکیده
منابع مشابه
Numerical simulation of deformation of a metal foam Numerical simulation of deformation of a metal foam
Mathematical model for the description of deformation of a porous metal is constructed on the basis of generalized rheological method. In this method a new rheological element, so-called rigid contact, is used to describe the uniaxial deformation of materials with different resistance to tension and compression. Change in the resistance of a porous metal to external loads, when the collapse of ...
متن کاملMetal Foam and Finned Metal Foam Heat Sinks for Electronics Cooling in Buoyancy-Induced Convection
In this paper, we present our recent experimental results on buoyancy-induced convection in aluminum metal foams of different pore densities [corresponding to 5, 10, 20, and 40 pores per in. (PPI)] and porosities (0.89–0.96). The results show that compared to a heated surface, the heat transfer coefficients in these heat sinks are five to six times higher. However, when compared to commercially...
متن کاملPitch related to spectral edges of broadband signals.
A complex tone often evokes a pitch sensation associated with its extreme spectral components, besides the holistic pitch associated with its fundamental frequency. We studied the edge pitch created at the upper spectral edge of complexes with a low-pass spectrum by asking subjects to adjust the frequency of a sinusoidal comparison tone to the perceived pitch. Measurements were performed for di...
متن کاملA Broadband Low-Noise-Amplifier
This report describes the design of a two-stage broadband low-noise-amplifier (LNA) for the frequency range from 3 GHz to 9 GHz, using GaAs MESFETs with an ft of 20 GHz. The passive components were implemented with microstrips. In the frequency band of operation, the achieved noise figure (NF) is within 0.5 dB from the minimum NF of a single transistor, the power gain is 15 dB, flat within 1 dB...
متن کاملInfants' sensitivity to broadband noise.
Infants have higher pure-tone thresholds than adults. One explanation is that infants do not adopt the frequency-selective listening strategy that adults use when detecting tones. In contrast to other models of infants' immature sensitivity, the listening strategy account predicts that infants will be more sensitive to broadband sounds, relative to adults. Infants 7-9 months old were tested in ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physics of Fluids
سال: 2019
ISSN: 1070-6631,1089-7666
DOI: 10.1063/1.5121248