Echo cancellation
A process which removes unwanted echoes from the signal on a telephone line. Echoes are usually caused by impedance mismatches along an analogue line.
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- Echocardiogram
[ek-oh-kahr-dee-uh-gram] /ˌɛk oʊˈkɑr di əˌgræm/ noun 1. a graphic record produced by an echocardiograph. /ˌɛkəʊˈkɑːdɪəʊˌɡræm/ noun 1. a visual display or record produced using echocardiography echocardiogram ech·o·car·di·o·gram (ěk’ō-kär’dē-ə-grām’) n. A visual record produced by echocardiography. echocardiogram (ěk’ō-kär’dē-ə-grām’) An ultrasound image of the heart that demonstrates the size, motion, and composition of cardiac structures and is […]
- Echocardiograph
[ek-oh-kahr-dee-uh-graf, -grahf] /ˌɛk oʊˈkɑr di əˌgræf, -ˌgrɑf/ noun, Medicine/Medical. 1. an instrument employing reflected ultrasonic waves to examine the structures and functioning of the heart.
- Echocardiography
[ek-oh-kahr-dee-uh-graf, -grahf] /ˌɛk oʊˈkɑr di əˌgræf, -ˌgrɑf/ noun, Medicine/Medical. 1. an instrument employing reflected ultrasonic waves to examine the structures and functioning of the heart. /ˌɛkəʊkɑːdɪˈɒɡrəfɪ/ noun 1. examination of the heart using ultrasound techniques echocardiography ech·o·car·di·og·ra·phy (ěk’ō-kär’dē-ŏg’rə-fē) n. The use of ultrasound in the diagnosis of cardiovascular lesions and in recording the size, motion, […]
- Echo-chamber
noun 1. a room or studio with resonant walls for broadcasting or recording echoes or hollow sound effects. noun 1. a room with walls that reflect sound. It is used to make acoustic measurements and as a source of reverberant sound to be mixed with direct sound for recording or broadcasting Also called reverberation chamber
- Echo-check
noun 1. a quality check and error-control technique for data transferred over a computer network or other communications link, in which the data received is stored and also transmitted back to its point of origin, where it is compared with the original data.