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Normal human ears can discriminate between two frequencies that differ by as little as 0.2%. [14] If one ear has normal thresholds while the other has sensorineural hearing loss (SNHL), diplacusis may be present, as much as 15–20% (for example 200 Hz one ear => 240 Hz in the other).
[3] [4] People are accustomed to the sound of their voice from the combination of internal and external stimuli, so people "build our self-image and vocal self image around what we hear, rather than the reality" according to Birchall. [2] In a 1967 study, only 38% of people were able to identify recordings of their own voice within 5 seconds ...
With an individual who does not stutter, auditory feedback speech sounds are directed to the inner ear with a 0.001 second delay. [11] In delayed auditory feedback, the delay is artificially disrupted. Studies have found that in children ages 4–6 there is less disturbance of speech than in children ages 7–9 under a delay of 200 ms. [12]
Yanny or Laurel is an auditory illusion that became popular in May 2018, in which a short audio recording of speech can be heard as one of two words. [1] 53 percent of over 500,000 respondents to a Twitter poll reported hearing a man saying the word "Laurel", while 47 percent of people reported hearing a voice saying the name "Yanny". [2]
In human development, muteness or mutism [1] is defined as an absence of speech, with or without an ability to hear the speech of others. [2] Mutism is typically understood as a person's inability to speak, and commonly observed by their family members, caregivers, teachers, doctors or speech and language pathologists.
Voice changers can be seen in various movies, including Scream, Saw, Super Troopers, Steel and a Talkboy voice changer was used in Home Alone 2: Lost in New York. Current affairs television shows and documentaries will sometimes employ the use of voice changers to disguise the voice of someone who wants to remain anonymous.
Bone conduction is one reason why a person's voice sounds different to them when it is recorded and played back. Because the skull conducts lower frequencies better than air, people perceive their own voices to be lower and fuller than others do, and a recording of one's own voice frequently sounds higher than one expects (see voice confrontation).
Autophony is the unusually loud hearing of a person's own voice.. Possible causes are: The "occlusion effect", caused by an object, such as an unvented hearing aid or a plug of ear wax, blocking the ear canal and reflecting sound vibration back towards the eardrum.