The sound absorption coefficient of the material was tested by standing wave tube method.
Methods Use a standing wave tube to measure the sound absorption coefficient of many kinds of grain.
By varying the loaded heat flux and wall emmisivity, the effect of gas temperature field and wall emmisivity on the equivalent gray absorption coefficient is studied.
The asymmetry factor commences to decrease with increasing absorption coefficient.
Compared with iodine, Gold has a larger atomic number and X-ray absorption coefficient.
The varies of special absorption coefficient and IR characteristics were discussed to show the aid bleaching of xylanase.
The absorption coefficient is often strongly wavelength-dependent.
Pump absorption saturation makes the population of the lower pump level and the absorption coefficient decrease, and the output power is lower.
The spacing of Ir is probably somewhat over estimated since the values of the energy and absorption coefficient of the resonance neutron group, used in the estimation, are not very accurate.
Both the optical absorption coefficient and bandgap decrease with increasing in film thickness.
average sound absorption coefficient
It found that the graphite changed the density of the coating, and improved the sound-absorption coefficient of the coating.
Various extinction observations indicate that the absorption coefficient depends on the wavelength, snow depth and the incident radiation intensity.
In the measurement of sound absorption coefficient in random incidence and determination of sound power levels of noise sources, the reverberation room is used very extensively.
The result shows that average absorption coefficient and noise reduction coefficient separately equal to0.58and0.60 and fine property of sound absorption at middle-low frequency.
While the gas medium is isothermal uniformed, the dissertation calculates the effective absorption coefficient, the Planck-mean absorption coefficient and the wall-incident mean coefficient.
國文精選館
