Separating turbofan engine noise sources using auto- and cross spectra from four microphones... The auto- and cross spectra in the frequency range below 1000Hz are fitted with a noise propagation model based on a source couplet consisting of a single incoherent monopole source with a single coherent monopole source or a source triplet consisting of a single incoherent monopole source with two coherent monopole point sources....
Separating turbofan engine noise sources using auto and cross spectra from four microphones... The auto- and cross spectra in the frequency range below 1000 Hz are fitted with a noise propagation model based on a source couplet consisting of a single incoherent monopole source with a single coherent monopole source or a source triplet consisting of a single incoherent monopole source with two coherent monopole point sources....
The equivalent force system of a monopole source in a fluid-filled open boreholeThe elastodynamic body-wave field outside a fluid-filled open borehole due to a monopole source in the fluid, is reduced to the radiation-field due to a suitable equivalent force system (EFS) in the absence of the borehole, consisting of a monopole plus a...
Equivalent monopole source of the geomagnetic south atlantic anomaly... In this paper we model the space-time evolution of this anomaly for the last 400 years in terms of the resultant between a decrease of a global axial dipole and an increase of a virtual localmonopole source....
