Tag: Hearing impairment

bear

What should parents do if they fail the hearing screening?

Hearing loss is the most common congenital birth defect in the world. The incidence rate of permanent hearing loss accounts for about 20% of all birth defects, with the incidence rate ranging from 1/1000 to 3/1000. Normal listening is a prerequisite for people to learn a language, The brain needs both ears to receive external stimuli continuously before it can acquire language. If children with hearing impairment are not diagnosed and treated in time, they will lose the ability to socialize and learn, bring them difficulties in life and psychological trauma, and eventually become a burden on their families and society. Hearing impairment in infancy can cause devastating damage to language learning, causing children to be deaf and dumb. If Read More …

bear

Can acoustic weapons be used to kill people?

The Secret of Hell’s Ladder The Biomedical Building at Brown University has an elevator called the “Ladder to Hell”. Once the elevator door is closed, although no what abnormality will be heard, passengers can feel their ears vibrating about four times a second and their bodies vibrating without coats. This is a typical old elevator, with an inner diameter of about 2 m × 2 m × 3 m, a buzzing fluorescent lamp and a curved blade of the fan on the ceiling. All these make it a perfect low frequency acoustic resonator. Even if one takes the elevator to only two floors, one will feel sick and uncomfortable. The power of this fan is not large, but the broken Read More …

bear

Hearing aids: Don’t make it a habit for the elderly [not to hear]

Hearing problems are very common among the elderly, The causes of senile hearing loss are various. At present, there is a relatively consistent view that it is related to the natural aging of the auditory system, the gradual accumulation of noise exposure, genetic factors, etc. The elderly not only show that they cannot hear some sounds, It is also manifested in the inability to understand each other’s words, which is even more prominent in the environment where children and grandchildren gather together and laugh. So does it mean that people are old and can’t hear, forget it? Or is it clear that your ears do not listen? Many studies have suggested that the elderly with hearing loss, As it becomes Read More …

bear

Who is more harmful to ears, ordinary earphones or in-ear earphones?

(The above picture shows ordinary earphones; The following figure shows in-ear headphones.) First, the damage caused by listening to earphones belongs to chronic sound damage. The damage of sound to hearing is called noise deafness in medicine. Noise deafness is mainly divided into chronic sound injury and acute sound injury: A. Chronic sound injury: refers to slow sensorineural deafness caused by long-term exposure to noise stimulation. B. Acute sound injury: It is caused by close explosion (such as bomb explosion nearby during war) and is caused by instantaneous exposure of high-intensity impulse noise. II. Noise Intensity and Exposure Time The severity of noise damage to hearing is mainly determined by noise intensity and exposure time. The greater the intensity, the Read More …

bear

Who is more harmful to ears, ordinary earphones or in-ear earphones?

(The above picture shows ordinary earphones; The following figure shows in-ear headphones.) First, the damage caused by listening to earphones belongs to chronic sound damage. The damage of sound to hearing is called noise deafness in medicine. Noise deafness is mainly divided into chronic sound injury and acute sound injury: A. Chronic sound injury: refers to slow sensorineural deafness caused by long-term exposure to noise stimulation. B. Acute sound injury: It is caused by close explosion (such as bomb explosion nearby during war) and is caused by instantaneous exposure of high-intensity impulse noise. II. Noise Intensity and Exposure Time The severity of noise damage to hearing is mainly determined by noise intensity and exposure time. The greater the intensity, the Read More …

bear

Be careful, 1.1 billion young people are at risk of hearing impairment!

The World Health Organization estimates that 1.1 billion young people worldwide are at risk of hearing loss caused by unsafe ear habits. Sales of smartphones have risen with the advent of technology, with more than a billion units sold worldwide in 2014. Nearly half of the 12-to 35-year-olds and young people in middle-and high-income countries listen with personal audio devices such as MP3 players and smartphones at unsafe volumes and for too long. Another 40% of the people came into contact with potentially destructive sound levels in nightclubs, discos and bars. Once the hearing is damaged, it will not be recovered! No matter how long, exposure to loud sounds can cause fatigue of sensory cells in the ear, resulting in Read More …