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
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

acoustic

[ə′küs·tik]
(acoustics)
Relating to, containing, producing, arising from, actuated by, or carrying sound.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

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.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.

acoustic

Associated with sound at frequencies that are audible to human beings.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved
References in periodicals archive ?
(10), this approach is considered superior to the median transverse and median longitudinal (sagittal) axes for visualising the neuraxial anatomy because of the larger acoustic window (16, 17).
The ligamentum flavum, dura, epidural space and anterior wall of spinal canal can be visualised through the 'acoustic window' between laminae, which represents the ultrasound reflections passing the interlaminar space (18).
There is a gap (acoustic window) between the sacrum and [L.sub.5] vertebra where the posterior and anterior complexes could be seen (Figure 7a and 7b).
The coelomic cavity was evaluated from the ventral, right and left cervical acoustic windows and from the right and the left prefemoral windows in longitudinal and transverse sections to the axis of the animal.
The large intestine was observed through the prefemoral acoustic windows with thin walls, hypoechoic and without evident parietal stratification (0.1 [+ or -] 0.05cm) (Figure 2C).
In scans of the prefemoral acoustic windows, the kidneys were observed in the dorsocaudal direction as compact hypoechoic structures relative to the testicles and liver, with homogeneous parenchyma, medium texture, smooth margins and intense vascularization.
Of the 29 cases that radiographically demonstrated a potential acoustic window, 27 (93%) animals revealed an effective acoustic window.
Based on the opinion of at least one of the blinded observers, 9 of the 29 cases were considered to not have a potential acoustic window. Two cases did not form an effective acoustic window, but in 7 cases, an ultrasound image was obtained.
Use of additional modalities may be required for a complete diagnosis in cases with mixed variety, heterotaxy and poor acoustic windows.
3) Technical: This includes poor acoustic windows and type of machine used.