If reflection and transmission at i

If reflection and transmission at interfaces is followed through the component, only a small percentage of the original energy makes it back to the transducer, even when loss by attenuation is ignored. For example, consider an immersion inspection of a steel block. The sound energy leaves the transducer, travels through the water, encounters the front surface of the steel, encounters the back surface of the steel and reflects back through the front surface on its way back to the transducer. At the water steel interface (front surface), 12% of the energy is transmitted. At the back surface, 88% of the 12% that made it through the front surface is reflected. This is 10.6% of the intensity of the initial incident wave. As the wave exits the part back through the front surface, only 12% of 10.6 or 1.3% of the original energy is transmitted back to the transducer.

Keputusan (Bahasa Melayu) 1:

jika pantulan dan penghantaran pada muka diikuti melalui komponen, hanya peratusan kecil tenaga asal menjadikannya kembali kepada transduser, walaupun kerugian yang disebabkan oleh pengecilan diabaikan. sebagai contoh, mempertimbangkan pemeriksaan rendam blok keluli. tenaga bunyi daun transduser, bergerak melalui air, menghadapi permukaan hadapan keluli,menghadapi permukaan belakang keluli dan mencerminkan kembali melalui permukaan hadapan dalam perjalanan kembali ke transduser. di muka keluli air (permukaan depan), 12% daripada tenaga yang dihantar. di permukaan belakang, 88% daripada 12% yang dibuat melalui permukaan hadapan dapat dilihat. ini adalah 10.6% daripada intensiti gelombang kejadian awal.sebagai keluar gelombang bahagian belakang melalui permukaan hadapan, hanya 12% daripada 10.6 atau 1.3% daripada tenaga yang asal dihantar kembali ke transduser.