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If so many reflections arrive at a listener that he cannot distinguish between them, the proper term is reverberation.
An echo can be explained as a wave that has been reflected by a discontinuity in the propagation medium, and returns with sufficient magnitude and delay to be perceived.
The intensity of an echo is frequently measured in dB relative to the directly transmitted wave.
Echoes may be desirable (as in sonar) or undesirable (as in telephone systems).
In computing, an echo is the printing or display of characters (a) as they are entered from an input device, (b) as instructions are executed, or (c) as retransmitted characters received from a remote terminal.
In computer graphics, an echo is the immediate notification of the current values provided by an input device to the operator at the display console.
Some information from Federal Standard 1037CFederal Standard 1037C entitled Telecommunications: Glossary of Telecommunication Terms is a U. Federal Standard, issued by the General Services Administration pursuant to the Federal Property and Administrative Services Act of 1949, as amended. This docu and from MIL-STD-188MIL-STD-188 is a series of U. military standards relating to telecommunications. Documents 100 Common Long Haul and Tactical Communication System Technical Standards. 105 Interoperability and Performance Standards for the All Digital Tactical-To-Strategic.
The name "echo" comes from Greek mythologyGreek mythology comprises the collected legends of Greek gods and goddesses and ancient heroes and heroines, originally created and spread within an oral-poetic tradition. Our surviving sources of mythology are either transcriptions of this spoken word, o. EchoIn Greek mythology, Echo ( Greek Ηχω) was an Oread who had the job of talking incessantly to Hera, the Queen of the Gods, so that her husband, Zeus, wouldn't get caught in his numerous affairs. According to some sources, Hera caught on to Ec was an OreadIn Greek mythology, Oreads (ρος, "mountain") were a type of nymph that lived in mountains. They were associated with Aphrodite. Oreads # Britomartis # Cynosura # Echo # Oenone # Pleiades ## Aero ## Asterope ## Dryope ## Electra ## Maia who had the job of talking incessantly to HeraThis article is about the goddess. For the asteroid, see 103 Hera, and also 1 Ceres, which briefly bore the name Hera. In the Olympian pantheon of classical Greek Mythology, Hera the Great Goddess of pre- Hellene Minoan culture transmitted to the Greeks t, the Queen of the Gods, so that her husband, ZeusZeus Kronios (descendant of Cronus), or simply Zeus or Zdeus ( Greek ) or Dias (Greek ) ("divine king") is the leader of the gods and god of the sky and thunder in Greek mythology. Etymology Zeus is the continuation of Dyeus, the supreme god in Indo-Europ, wouldn't get caught in his numerous affairs. Hera caught on to Echo's trick and cursed her to only be able say what others had just said -- hence the word "echo".
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