The PZT matching layer redistributes the frequency spectrum of an original broadband ultrasonic probe, and acts as a frequency filter without reducing the wave amplitude.

• 此层锆钛酸铅匹配层可将原本超音波探头之宽频率分布过滤成某些特定频率之峰值，且没有降低该频率峰值相对于原始探头强度之强度。