In the previous pages, it was point

In the previous pages, it was pointed out that sound waves propagate due to the vibrations or oscillatory motions of particles within a material. An ultrasonic wave may be visualized as an infinite number of oscillating masses or particles connected by means of elastic springs. Each individual particle is influenced by the motion of its nearest neighbor and both inertial and elastic restoring forces act upon each particle

A mass on a spring has a single resonant frequency determined by its spring constant k and its mass m. The spring constant is the restoring force of a spring per unit of length. Within the elastic limit of any material, there is a linear relationship between the displacement of a particle and the force attempting to restore the particle to its equilibrium position. This linear dependency is described by Hooke's Law.

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di muka surat sebelum ini, ia telah menunjukkan bahawa gelombang bunyi menyebarkan disebabkan oleh getaran atau gerakan ayunan zarah dalam bahan. gelombang ultrasonik boleh dilihat sebagai nombor terhingga ramai berayun atau zarah yang berkaitan dengan cara air elastik.setiap zarah individu dipengaruhi oleh gerakan jiran terdekat dan kedua-dua inersia dan elastik kuasa memulihkan bertindak atas setiap zarah

massa pada musim bunga mempunyai frekuensi salunan tunggal ditentukan oleh k spring yang berterusan dan m besar-besaran. berterusan musim bunga adalah daya pemulihan daripada musim bunga bagi setiap unit panjang. dalam had anjal apa-apa bahan,terdapat hubungan linear antara anjakan zarah dan tenaga cuba untuk mengembalikan zarah kepada kedudukan keseimbangan. pergantungan linear ini digambarkan oleh hukum Hooke.