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Those who can see their environments often do not readily perceive echoes from nearby objects, due to an echo suppression phenomenon brought on by the precedence effect. However, with training, sighted individuals with normal hearing can learn to avoid obstacles using only sound, showing that echolocation is a general human ability. [9]
Chloe, having never heard an echo before, is confused on hearing the fisherman's song repeated in a nearby valley. Daphnis promises to tell her the story of Echo in exchange for ten more kisses. [13] Daphnis’ rendition differs radically from Ovid's account. According to Daphnis, Echo was raised among the Nymphæ because her mother was a nymph.
The Exoplanet Characterisation Observatory (EChO) was a proposed space telescope [2] as part of the Cosmic Vision roadmap of the European Space Agency, and competed with four other missions for the M3 slot in the programme. On 19 February 2014 the PLATO mission was selected in place of the other candidates in the programme, including EChO. [4]
Humans may jam echolocating animals deliberately or accidentally. Recent efforts have been made to develop acoustic jamming deterrents to exclude bats from buildings or bridges, or to keep bats away from wind turbines where large numbers of mortalities occur. [29] These deterrents have been shown to reduce bat activity over a small area.
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Unlike some human-made sonars that rely on many extremely narrow beams and many receivers to localize a target (multibeam sonar), animal echolocation has only one transmitter and two receivers (the ears) positioned slightly apart. The echoes returning to the ears arrive at different times and at different intensities, depending on the position ...
Echoic memory is the sensory memory that registers specific to auditory information (sounds). Once an auditory stimulus is heard, it is stored in memory so that it can be processed and understood. [1]
In other words, echogenicity is higher when the surface bouncing the sound echo reflects increased sound waves. Tissues that have higher echogenicity are called "hyperechoic" and are usually represented with lighter colors on images in medical ultrasonography. In contrast, tissues with lower echogenicity are called "hypoechoic" and are usually ...