echo  
[ˈekoʊ]
Definition:  1. The persistence of a sound after its source has stopped. 2. A reply that repeats what has just been said. 3. To say again or imitate. 4. Ring or echo with sound. 5. Call to mind.
Use 'echo' in a sentence:  
So, the echoes  from a tree are going to a mass of chaotic acoustic reflections, not like the echo  from a moth. The valley echoed  back his voice. I hear an echo  of the thinking that got us into this mess in the first place. We shouted in the valley, and in an instant, the echo  came from the hillside with great distinctness. He found that the length of time it takes a sound's echo  to decay is determined by the absorption of the sound's original energy by surrounding material. This is a view echoed  by many on the right of the party. For example, one echo  they quickly identify is the one they associate with a moth, which is common prey for a bat, particularly a moth beating its wings. These structures had been detected years earlier by echo-sounding instruments, but they had never been penetrated in the course of drilling. The street echoed  with the cries of children. Pinks and beiges were chosen to echo  the colours of the ceiling. In our case, we have found the true acoustic echo  beacon. The father explains, "People call this ECHO , but really this is life." His feet echoed  on the bare board floor. We shouted in the valley, and in an instant the echo  came from the hillside with great distinctness. The data he compiled yielded a mathematical formula for the relationship between a room's echo  duration, its quantity and quality of sound-absorbing materials, and its spatial volume. He is an echo  of his master. The Foreign Secretary echoed  this sentiment. 'He's gone!' Viv echoed . He heard nothing but the echoes  of his own voice. Echo  is always complaining about her job as a cashier, but frankly it's something to have a job in these difficult days.The room echoed . The words of the young woman doctor echoed  in his ears. The corridor echoed  with the barking of a dozen dogs. I read that concert halls designed for symphony orchestras have too much echo  for jazz music. I think your husband should legalize immigration. Please put a statue of me in Echo  Park. Thank you. No, really. I want a tuxedo on the statue. Multiple clusters echo  state network for chaotic time series prediction. Those produce a large number of faint reflections in what's called as: a smooth of echo . You are on the right track—it is actually the echo  of all the leaves as a whole that matters. His words were an echo  of what she had heard many times before. These bats can distinguish between the two, and not just with trees, but with any echo  that comes in a smooth or rough shape. These findings echo  earlier research that suggests our perception of food can sometimes trick our body's response to the food itself. The Virgilian echo  gives this passage in Milton an unmistakable pathos and an undeniable beauty. The accident has echoes  of past disasters. The bang came suddenly, echoing  across the buildings, shattering glass. The old fable continues to echo  down the centuries. Like bats, they send out sound waves and make sense of their environment from the echoes  they receive back. But an oak which has fewer but bigger leaves with stronger reflections, produces a jagged wave form, or what we called a rough echo . The hills sent back a faint echo . The gunshot echoed  through the forest. These just fade out on shallow beaches, so the whale doesn't hear an echo  and it crashes onto the shore. Then he heard a piercing scream echoing  down the deep well, ending in a dull, dead thud. The whole house echoed . Their views often echo  each other. Political attacks work only if they find an echo  with voters. The girl let out a giggle that seemed to echo , and she ran away. Distant creaks and groans echoed  eerily along the dark corridors. Her footsteps echoed  in the empty room. Samson begins to echo  Milton from the invocation that we've been looking at, the invocation to Book Three of Paradise Lost. Yesterday's crash has grim echoes  of previous disasters. Many phrases in the last two chapters echo  earlier passages. There was an echo  on the line and I couldn't hear clearly. The speech found an echo  in the hearts of many of the audience.