Contagious yawning, in which yawning is triggered involuntarily when we observe another person yawn, is a common form of echophenomena—the automatic imitation of another's words (echolalia) or actions (echopraxia) [1].
Typical examples are the echo produced by the bottom of a well, by a building, or by the walls of an enclosed room and an empty room. A true echo is a single reflection of the sound source.
Echophenomenon (also known as echo phenomenon; from Ancient Greek ἠχώ (ēkhṓ) "echo, reflected sound") is "automatic imitative actions without explicit awareness" or pathological repetitions of external stimuli or activities, actions, sounds, or phrases, indicative of an underlying disorder.
Some common synonyms of imitate are ape, copy, mimic, and mock.
Echopraxia on its own isn't a medical condition. Rather, it is a symptom of a brain disorder or injury. It appears in people who have epilepsy, autoimmune conditions, autism, and major neurocognitive disorders (dementia). It is also a common feature in culture-bound syndromes like latah, amurakh and imu.
Hence, the phenomenon of echo of sound waves is due to reflection.
Reflection of sound waves also leads to echoes. Echoes are different than reverberations. Echoes occur when a reflected sound wave reaches the ear more than 0.1 seconds after the original sound wave was heard.
The echo chamber effect occurs online when a harmonious group of people amalgamate and develop tunnel vision. Participants in online discussions may find their opinions constantly echoed back to them, which reinforces their individual belief systems due to the declining exposure to other's opinions.
TikTok's algorithm is designed to show users content that aligns with their interests and beliefs. While this can enhance user experience, it can also create echo chambers, where users are only exposed to content that reinforces their existing views and opinions.
His construction and engineering teams perfected the echo booth at Abbey Road Studios in London. It was one of the first studios in the world to be specially built for recording purposes when it was established in 1931; it remains in place and is a prime example of the early 20th-century electro-acoustic echo chamber.
For example, you might say ''Hello,'' and then a few seconds later, you hear the word ''Hello'' again. This called an echo. The sound waves left your mouth, traveled through the air, hit a hard surface, such as a wall, and then bounced back again, causing you to hear the sound again.
Echo is caused by loud noises in large spaces with many reflective surfaces. When the sound has room to travel and there is nothing absorbing or stopping the sound from reflecting off the walls, floor, ceiling, and windows, the sound energy is able to return to you as a distinct repetition of the original sound.
High ceilings and sound-reflecting surfaces, such as glass, stone, tile and hardwood often can produce unwanted echoes in your home. If you find the reverberations distracting, you don't have to break the bank to find ways to dampen your rooms' lively acoustics.
Sound Reflection
The speed of sound is 343 m/s. The direction of the sound changes after it bounces off a surface. But interestingly, the echo is exactly the same as the original sound. Echoes are heard in enclosed spaces with hard and tough walls such as wells, caves, or large auditoriums.
How Does Echolocation Work on Humans? Surprisingly, echolocation can be learned as a skill. Experts have found that the human brain has areas that are dedicated to processing echoes. They also estimate that about 20 to 30 percent of blind people learn how to echolocate at some point in their lives.
Echo generally occurs in large buildings or a mountain.
When sound is repeatedly reflected from a number of obstacles at suitable distances many echoes are heard one after the other. This constitutes multiple echoes.
An echo is a sound caused by the reflection of sound waves from a surface back to the listener. It is the reflection of sound, arriving at the listener sometime after the direct sound.
If your space has large windows, sturdy curtains can help decrease the room's overall echo. The only downside here is that it also reduces natural light in the process. However, it's one way to cost-effectively reduce echo with something you're probably already going to purchase or need for the room or space.
An echo is a sound caused by the reflection of sound waves from a surface back to the listener.
Because small rooms absorb more sound. Beacuse time gap between direct sound and reflected sound too low to be perceptible by human ear. Because small rooms reflect less amount of energy.
Applications of echoes
Echoes are used by bats, dolphins and fisherman to detect an object / obstruction. They are also used in SONAR (Sound navigation and ranging) and RADAR(Radio detection and ranging) to detect an obstacle.
It's official, the world's longest echo can be heard at an oil storage complex at Inchindown, near Invergordon in Scotland.