Which of the following is NOT one of the seven acoustic parameters?

The seven acoustic parameters in ultrasound physics include wavelength, amplitude, and frequency, among others. These parameters define the characteristics of an ultrasound wave and are critical for understanding how ultrasound interacts with tissues and produces images.

Wavelength refers to the distance between consecutive peaks of a wave, which influences the resolution of the images produced. Amplitude conveys the strength or intensity of the ultrasound wave, impacting the brightness of the echoes received. Frequency is the number of cycles of the wave that occur per second, and it also affects the resolution and penetration ability of the ultrasound wave.

In contrast, texture is not considered an acoustic parameter. While texture can be described in ultrasound images—often referring to the appearance of a tissue or organ as it relates to its echogenic properties—it does not fit into the established categories of acoustic properties that specifically relate to the physical characteristics of sound waves themselves. Thus, texture does not belong to the group commonly recognized as the seven acoustic parameters.