acoustic

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acoustic

, acoustical
1. of or related to sound, the sense of hearing, or acoustics
2. designed to respond to, absorb, or control sound
3. (of a musical instrument or recording) without electronic amplification

acoustic

[ə′küs·tik]
(acoustics)
Relating to, containing, producing, arising from, actuated by, or carrying sound.

acoustic, acoustical

The qualifying adjectives acoustic and acoustical have the following meanings: arising from, actuated by, containing, producing, or related to sound. In general, acoustic is used when the term being qualified designates something that has the properties, dimensions, or physical characteristics associated with sound waves; acoustical is used when the term being qualified does not explicitly designate something that has the properties, dimensions, or physical characteristics of sound (e.g., acoustical engineering). However, sometimes these two terms are used interchangeably.

acoustic

Associated with sound at frequencies that are audible to human beings.
References in periodicals archive ?
Ultrasound typically shows a well-defined hyperechoic or isoechoic mass with a hypoechoic rim and posterior acoustic shadowing.
Ultrasound guidance is of limited value due to acoustic shadowing from the clavicle (2).
Large side branches, signal dropout behind stent struts and acoustic shadowing due to extensive calcification can cause difficulty in these measurements.

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