echo

Ech·o

E0027200 (ĕk′ō)n. Greek Mythology A nymph whose unrequited love for Narcissus caused her to pine away until only her voice remained.

ech·o

E0027200 (ĕk′ō)n. pl. ech·oes 1. a. Repetition of a sound by reflection of sound waves from a surface.b. The sound produced in this manner.2. A repetition or an imitation: a fashion that is an echo of an earlier style.3. A remnant or vestige: found echoes of past civilizations while examining artifacts in the Middle East.4. One who imitates another, as in opinions, speech, or dress.5. A sympathetic response: Their demand for justice found an echo in communities across the nation.6. A consequence or repercussion: Her resignation had echoes throughout the department.7. Repetition of certain sounds or syllables in poetry, as in echo verse.8. Music Soft repetition of a note or phrase.9. Electronics A reflected wave received by a radio or radar.10. An echocardiogram.v. ech·oed, ech·o·ing, ech·oes v.tr.1. To repeat (a sound) by the reflection of sound waves from a surface.2. To repeat or imitate: followers echoing the cries of their leader; events that echoed a previous incident in history.v.intr.1. To be repeated by or as if by an echo: The shout echoed off the wall. The speaker's words echoed in her mind.2. To resound with or as if with an echo; reverberate: rooms echoing with laughter.

[Middle English, from Old French, from Latin ēchō, from Greek ēkhō.]

ech′o·er n.ech′o·ey adj.Synonyms: echo, reflect, resound, reverberate
These verbs mean to be repeated by the reflection of sound waves: a cry that echoed through the canyon; traffic noise reflecting off the buildings; a loud hammering that resounded through the tunnel; a final chord that reverberated in the concert hall.

echo

(ˈɛkəʊ) n, pl -oes1. (General Physics) a. the reflection of sound or other radiation by a reflecting medium, esp a solid objectb. the sound so reflected2. a repetition or imitation, esp an unoriginal reproduction of another's opinions3. something that evokes memories, esp of a particular style or era4. (sometimes plural) an effect that continues after the original cause has disappeared; repercussion: the echoes of the French Revolution. 5. a person who copies another, esp one who obsequiously agrees with another's opinions6. (Electronics) a. the signal reflected by a radar targetb. the trace produced by such a signal on a radar screen7. (Poetry) the repetition of certain sounds or syllables in a verse line8. (Music, other) the quiet repetition of a musical phrase9. (Instruments) Also called: echo organ or echo stop a manual or stop on an organ that controls a set of quiet pipes that give the illusion of sounding at a distance10. (Music, other) an electronic effect in recorded music that adds vibration or resonancevb, -oes, -oing or -oed11. to resound or cause to resound with an echo: the cave echoed their shouts. 12. (intr) (of sounds) to repeat or resound by echoes; reverberate13. (tr) (of persons) to repeat (words, opinions, etc), in imitation, agreement, or flattery14. (tr) (of things) to resemble or imitate (another style, earlier model, etc)15. (Computer Science) (tr) (of a computer) to display (a character) on the screen of a visual display unit as a response to receiving that character from a keyboard entry[C14: via Latin from Greek ēkhō; related to Greek ēkhē sound] ˈechoing adj ˈecholess adj ˈecho-ˌlike adj

Echo

(ˈɛkəʊ) n (Astronautics) either of two US passive communications satellites, the first of which was launched in 1960

Echo

(ˈɛkəʊ) n (Classical Myth & Legend) Greek myth a nymph who, spurned by Narcissus, pined away until only her voice remained

Echo

(ˈɛkəʊ) n (Telecommunications) communications code word for the letter e

ech•o

(ˈɛk oʊ)

n., pl. ech•oes,
v. n. 1. a repetition of sound produced by the reflection of sound waves from a wall, mountain, or other obstructing surface. 2. a sound heard again near its source after being reflected. 3. any repetition or close imitation, as of the ideas or words of another. 4. a person who reflects or imitates another. 5. a sympathetic or identical response, as to sentiments expressed. 6. a lingering trace or effect. 7. (cap.) a mountain nymph who pined away for love of Narcissus until only her voice remained. 8. the reflection of a radio wave, as in radar. v.i. 9. to emit an echo; resound with an echo: The hall echoed with cheers. 10. to be repeated by or as if by an echo. v.t. 11. to repeat by or as if by an echo; emit an echo of. 12. to repeat or imitate the words, sentiments, etc., of (a person). 13. to repeat or imitate (words, sentiments, etc.). [1300–50; Middle English ecco < Latin ēchō < Greek, akin to ēchḗ sound] ech′o•er, n. ech′o•less, adj.

ech·o

(ĕk′ō)1. A repeated sound that is caused by the reflection of sound waves from a surface. The sound is heard more than once because of the time difference between the initial production of the sound waves and their return from the reflecting surface.2. A reflected radio wave. Echoes of radio waves are the basis for radar.

echo

Past participle: echoed
Gerund: echoing

Imperative
echo
echo

Present
I echo
you echo
he/she/it echoes
we echo
you echo
they echo

Preterite
I echoed
you echoed
he/she/it echoed
we echoed
you echoed
they echoed

Present Continuous
I am echoing
you are echoing
he/she/it is echoing
we are echoing
you are echoing
they are echoing

Present Perfect
I have echoed
you have echoed
he/she/it has echoed
we have echoed
you have echoed
they have echoed

Past Continuous
I was echoing
you were echoing
he/she/it was echoing
we were echoing
you were echoing
they were echoing

Past Perfect
I had echoed
you had echoed
he/she/it had echoed
we had echoed
you had echoed
they had echoed

Future
I will echo
you will echo
he/she/it will echo
we will echo
you will echo
they will echo

Future Perfect
I will have echoed
you will have echoed
he/she/it will have echoed
we will have echoed
you will have echoed
they will have echoed

Future Continuous
I will be echoing
you will be echoing
he/she/it will be echoing
we will be echoing
you will be echoing
they will be echoing

Present Perfect Continuous
I have been echoing
you have been echoing
he/she/it has been echoing
we have been echoing
you have been echoing
they have been echoing

Future Perfect Continuous
I will have been echoing
you will have been echoing
he/she/it will have been echoing
we will have been echoing
you will have been echoing
they will have been echoing

Past Perfect Continuous
I had been echoing
you had been echoing
he/she/it had been echoing
we had been echoing
you had been echoing
they had been echoing

Conditional
I would echo
you would echo
he/she/it would echo
we would echo
you would echo
they would echo

Past Conditional
I would have echoed
you would have echoed
he/she/it would have echoed
we would have echoed
you would have echoed
they would have echoed

Thesaurus

Noun	1.	echo - the repetition of a sound resulting from reflection of the sound waves; "she could hear echoes of her own footsteps"reverberation, sound reflection, replicationreflectivity, reflexion, reflection - the ability to reflect beams or raysre-echo - the echo of an echo
	2.	Echo - (Greek mythology) a nymph who was spurned by Narcissus and pined away until only her voice remainedGreek mythology - the mythology of the ancient Greeksnymph - (classical mythology) a minor nature goddess usually depicted as a beautiful maiden; "the ancient Greeks believed that nymphs inhabited forests and bodies of water"
	3.	echo - a reply that repeats what has just been saidreply, response - the speech act of continuing a conversational exchange; "he growled his reply"echolalia - an infant's repetition of sounds uttered by others
	4.	echo - a reflected television or radio or radar beamreflectivity, reflexion, reflection - the ability to reflect beams or rayselectronics - the branch of physics that deals with the emission and effects of electrons and with the use of electronic devices
	5.	echo - a close parallel of a feeling, idea, style, etc.; "his contention contains more than an echo of Rousseau"; "Napoleon III was an echo of the mighty Emperor but an infinitely better man"analog, analogue, parallel - something having the property of being analogous to something else
	6.	echo - an imitation or repetition; "the flower arrangement was created as an echo of a client's still life"imitation - copying (or trying to copy) the actions of someone else
Verb	1.	echo - to say again or imitate; "followers echoing the cries of their leaders"repeatrecite - repeat aloud from memory; "she recited a poem"; "The pupil recited his lesson for the day"cuckoo - repeat monotonously, like a cuckoo repeats his callreecho - repeat back like an echoparrot - repeat mindlessly; "The students parroted the teacher's words"regurgitate, reproduce - repeat after memorization; "For the exam, you must be able to regurgitate the information"let loose, let out, utter, emit - express audibly; utter sounds (not necessarily words); "She let out a big heavy sigh"; "He uttered strange sounds that nobody could understand"
	2.	echo - ring or echo with sound; "the hall resounded with laughter"resound, reverberate, ringsound, go - make a certain noise or sound; "She went `Mmmmm'"; "The gun went `bang'"consonate - sound in sympathyreecho - repeat or return an echo again or repeatedly; send (an echo) backreecho - echo repeatedly, echo again and againbong - ring loudly and deeply; "the big bell bonged"
	3.	echo - call to mind; "His words echoed John F. Kennedy"recallresemble - appear like; be similar or bear a likeness to; "She resembles her mother very much"; "This paper resembles my own work"

echo

noun1. reverberation, ringing, repetition, answer, resonance, resounding He heard nothing but the echoes of his own voice in the cave.2. copy, reflection, clone, reproduction, imitation, duplicate, double, reiteration Their cover version is just a pale echo of the real thing.3. reminder, suggestion, trace, hint, recollection, vestige, evocation, intimation The accident has echoes of past disasters.verb1. reverberate, repeat, resound, ring, resonate The distant crash of bombs echoes through the whole city.2. recall, reflect, copy, mirror, resemble, reproduce, parrot, imitate, reiterate, ape Many phrases in the last chapter echo earlier passages.

echo

noun1. Repetition of sound via reflection from a surface:repercussion, reverberation.2. Imitative reproduction, as of the style of another:imitation, reflection, reflex, repetition.3. One who mindlessly imitates another:imitator, mimic, parrot.verb1. To send back the sound of:rebound, reecho, reflect, repeat, resound, reverberate.2. To copy (another) slavishly:image, imitate, mimic, mirror, parrot, reflect, repeat.

Translations

回声重复发出回声

echo

(ˈekəu) – plural ˈechoes – noun the repeating of a sound caused by its striking a surface and coming back. The children shouted loudly in the cave so that they could hear the echoes.回声 verb – past tense ˈechoed – 1. to send back an echo or echoes. The cave was echoing with shouts; The hills echoed his shout.发出回声2. to repeat (a sound or a statement). She always echoes her husband's opinion.重复

echo

→ 回声zhCN

echo

Echo,

in Greek mythology, mountain nymph. She assisted Zeus in one of his amorous adventures by distracting Hera with her chatter. For this Hera made her unable to speak except to repeat another's last words. She fell in love with Narcissus, but when he rejected her, she pined away until only her voice remained. In another myth, she was loved by Pan, who, because he could not win her, caused shepherds to tear her asunder; Gaea buried her limbs, leaving only her voice.

echo,

reflection of a sound wave back to its source in sufficient strength and with a sufficient time lag to be separately distinguished. If a sound wave returns within 1-10 sec, the human ear is incapable of distinguishing it from the orginal one. Thus, since the velocity of sound is c.344 m (1,130 ft) per sec at a normal room temperature of about 20&degC; (68&degF;), a reflecting wall must be more than 16.2 m (56 1-2 ft) from the sound source at this temperature for an echo to be heard by a person at the source. In this case the sound requires 1-20 sec to reach the reflecting surface and the same time to return. Bats navigate by listening for the echo of their high-frequency cry. Sonar and depth sounders work by analyzing electronically the echo time lag of sound waves, generally between 10 and 50 kilohertz, produced by underwater transducers. Radar sets broadcast radio waves, usually between 100 and 10,000 megahertz, pick up the portion reflected back by objects, and electronically determine the distance and direction of the objects. A sound echo that is reflected again and again from different surfaces, as by parallel walls in a tunnel, is called reverberation. When a surface reflects sound it partially absorbs and partially reflects the energy. As the process is repeated the sound becomes weaker and weaker and eventually ceases.

Echo

A sound wave which has been reflected or otherwise returned with sufficient magnitude and time delay to be perceived in some manner as a sound wave distinct from that directly transmitted. Multiple echo describes a succession of separately indistinguishable echos arising from a single source. When the reflected waves occur in rapid succession, the phenomenon is often termed a flutter echo. Echoes and flutter echoes are generally detrimental to the quality of the acoustics of rooms. They may be minimized through the proper selection of room dimensions, room shape, and distribution of sound-absorbing materials.

Echoes have been put to a variety of uses in measurement problems. For example, the distance between two points can be measured by timing the duration required for a direct sound originating at one location to strike an object at the other point and to return an echo to the location of the initial source. Ultrasonic echo techniques have achieved considerable success in nondestructive testing of materials. See Reflection of sound, Sound, Ultrasonics

Echo

a device used in composition and performance that consists in the repetition of a musical phrase, gradually decreasing in volume, by the same or different voices or instruments. The echo is used mainly in choral works, operas, orchestral music, and chamber music. Sometimes the device is the basis for entire musical works or sections of works, as in O. di Lasso’s madrigal “O là, o che bon eccho,” or the section entitled “Echo” in J. S. Bach’s Partita in B minor for harpsichord. This device has been frequently used in operatic scenes (Orfeo ed Euridice by Gluck and Ariadne auf Naxos by R. Strauss), and in classical compositions {Echo, a composition for two-string trios by Haydn, Hoboken II, 39; Nocturne for Four Orchestras by Mozart, K. 286). One of the registers of the organ is also called an echo.

Echo

(from the name of the nymph Echo in Greek mythology), an acoustic, electromagnetic, or other wave reflected from some barrier and perceived by an observer. For example, an acoustic echo may be observed upon reflection of an acoustic pulse, such as a knock or a brief, abrupt shout, from surfaces with good reflecting properties. An echo is discernible to the ear if the transmitted and received pulses are separated by a time interval τ ≥ 50–60 msec.

An echo becomes multiple if there are several reflecting surfaces (near a group of buildings or in the mountains), the sound from which reaches the observer at moments of time separated by intervals of τ ≥ 50–60 msec. A harmonic echo arises upon the scattering of sound with a broad frequency spectrum by barriers with dimensions that are small compared with the wavelengths λ of the components of the spectrum. In an enclosure, numerous separate echoes merge into continuous repercussions (seeREVERBERATION).

An echo may be a means of measuring the distance r from a signal source to the reflecting object: r = cτ/2, where τ is the time interval between the signal burst and return of the echo and c is the velocity of wave propagation in the medium. Various applications of echo signals are based on this principle. The operation of sonar is based on the acoustic echo, which is also used in navigation, where echo sounders are used to measure depth. Electromagnetic echo is used in radar; being reflected from the ionosphere, it permits shortwave radio communication over great distances, as well as determination of the properties of the ionosphere. The echo-wave principle is also beginning to be used in the optical band of electromagnetic waves generated by a quantum optical generator. Elastic waves propagating in the crust of the earth, reflecting from layers of various rocks, form a seismic echo that is used to locate mineral deposits. Echoes can be used to measure the depth of boreholes (echo ranging of wells) and the height of the liquid level in tanks (ultrasonic level gauges). Echo methods are extensively used in ultrasonic flaw detection. For some animals, such as bats, dolphins, and whales, acoustic echo is a means of orientation and of locating prey.

REFERENCES

Strutt, J. W. (Lord Rayleigh). Teoriia zvuka, 2nd ed. vol. 2. Moscow, 1955. (Translated from English.)
Griffin, D. Ekho v zhizni liudei i zhivotnykh. Moscow, 1961. (Translated from English.)

echo

[′ek·ō] (electronics) The signal reflected by a radar target, or the trace produced by this signal on the screen of the cathode-ray tube in a radar receiver. Also known as radar echo; return. ghost signal (physics) A wave packet that has been reflected or otherwise returned with sufficient delay and magnitude to be perceived as a signal distinct from that directly transmitted.

echo

Sound waves which have been reflected to a listener with sufficient magnitude and time delay so as to be perceived separately from those communicated directly to the listener.

echo

i. In radar, a wave reflected from one or more points and returned with a magnitude and a time interval sufficient to be perceived and interpreted. It is observed on the radar indicator. See blip.
ii. The pulse of reflected RF (radio frequency) energy.
iii. A reflected sound wave.

Echo

pined for Narcissus till only voice remained. [Gk. Myth.: Brewer Dictionary, 363; Br. Lit.: Comus, in Benét, 217]See: Love, Unrequited

Echo

beautiful nymph who, by her constant talk, kept Hera away from Zeus. [Gk. Myth.: Howe, 89]See: Talkativeness

echo

1. a. the reflection of sound or other radiation by a reflecting medium, esp a solid object b. the sound so reflected 2. a. the signal reflected by a radar target b. the trace produced by such a signal on a radar screen 3. the repetition of certain sounds or syllables in a verse line 4. the quiet repetition of a musical phrase 5. a manual or stop on an organ that controls a set of quiet pipes that give the illusion of sounding at a distance 6. an electronic effect in recorded music that adds vibration or resonance

echo

(1)A topic group on FidoNet's echomail system.

Compare newsgroup.

echo

(2)A Unix command that just prints its arguments.

echo

(1) A repetition of a signal in a communications line. The difference in electrical characteristics at opposite ends can cause the echo.

(2) In communications, to transmit received data back to the sending station allowing the user to inspect what was received. A local echo displays what you type on your screen.

(3) (Echo) A family of devices with Amazon's Alexa virtual assistant. See Amazon Echo.

(4) A DOS/Windows screen command that displays messages and turns off/on screen responses. See batch file abc's.

echo

Ech·o

ech·o

echo

Echo

Echo

Echo

ech•o

ech·o

echo

echo

echo

echo

echo

echo

cheer (one) to the echo

echo back to (something)

echo with (something)

applaud (one) to the echo

echo back to something

echo with something

cheer someone to the echo

applaud (or cheer) someone to the echo

echo

Echo,

echo,

Echo

Echo

Echo

REFERENCES

echo

echo

echo

Echo

Echo

echo

echo

echo

echo

echo

ECHO

ech·o

ech·o

ultrasonography

ech·o

Patient discussion about echo

ECHO

echo

Synonyms for echo

noun reverberation

Synonyms

noun copy

Synonyms

noun reminder

Synonyms

verb reverberate

Synonyms

verb recall

Synonyms

Synonyms for echo

noun repetition of sound via reflection from a surface

Synonyms

noun imitative reproduction, as of the style of another

Synonyms

noun one who mindlessly imitates another

Synonyms

verb to send back the sound of

Synonyms

verb to copy (another) slavishly

Synonyms

Synonyms for echo

noun the repetition of a sound resulting from reflection of the sound waves

Synonyms

Related Words

noun (Greek mythology) a nymph who was spurned by Narcissus and pined away until only her voice remained

Related Words

noun a reply that repeats what has just been said

Related Words

noun a reflected television or radio or radar beam

Related Words