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handle: 10261/4867
[ES] En este trabajo se investiga la difusión de ondas acústicas por una esfera hueca, de tamaño grande (ka>>1), sumergida en agua y con aire en su interior, en el caso en que el espesor de la pared de la esfera sea muy delgado (espesor de la pared <2.5% del radio exterior). Se ha calculado la amplitud y la fase de la onda difundida en el fluido externo, en función de la frecuencia para un gran margen de frecuencias (ka=0÷134). El eco o respuesta temporal de la esfera se ha obtenido mediante la trasformada inversa de Fourier de la función de forma. Cuando la duración del impulso incidente es muy corta (<
[EN] Theoretical and computational scattering acoustic waves from a large hollow sphere (ka>>1) submerged into the water and with air inside are investigated in the case that the shell is very thin (thickness of the wall <2.5% of the outer radius). The amplitude and phase of the scattered wave in the external fluid is calculated as function of frequency for a very large frequency band (ka=0÷134). The time echo response of the sphere is obtained by inverse FFT transformation of the form function. The time response when the duration of the incident pulse is very short (<
Peer reviewed
Submerged spheres, Underwater acoustics, Sound backscattering
Submerged spheres, Underwater acoustics, Sound backscattering
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