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According to a 2020 report by The Lancet, hearing loss is one of the most preventable risk factors for cognitive diseases such as dementia, accounting for 8% of dementia cases.


Acoustic Transmission Medium

In physics, sound is a mechanical wave that propagates through a medium, such as gas, liquid, or solid. In human physiology and psychology, sound is perceived when the brain interprets these waves.

Sound waves require a medium to travel; they cannot propagate in a vacuum due to the absence of particles. The human auditory system can perceive sound waves within the frequency range of 20Hz to 20KHz, which is known as the audio range.

Acoustic Transmission Pathway

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2. The vibrations are transmitted from the eardrum to the ossicles (a set of small bones in the middle ear, also solids). The ossicles amplify these vibrations and send them to the cochlea (a fluid-filled structure in the inner ear).

3. Within the cochlea, tiny hair cells are set into motion by the vibrations and send electrical signals to the auditory nerve.

Sound waves (mechanical waves) transmit

through the air (a gas) and enter the ear canal.

4. The auditory nerve carries these signals to the brain, where they are interpreted as sound.

1. The sound waves reach the eardrum (a solid) and cause it to vibrate.

Areas Causing Hearing Loss

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Infection or natural problems with the bones in the middle ear.

Damage to neural structures can also cause hearing loss by impairing the conversion of sound vibrations into neural signals that can be interpreted by the brain.

Inner ear damage due to aging or exposure to loud noise. This type of hearing loss occurs when the hair cells or nerve cells in the cochlea, responsible for sending sound signals to the brain, become damaged and are unable to transmit electrical signals effectively.

Degeneration or damage to the eardrum

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Causes of Hearing Loss

Causes of Hearing Loss:

  • Natural Aging: The cochlea and auditory nerve cells undergo gradual degeneration with age, leading to hearing loss, typically starting around the age of 50.

  • Ear Diseases: Conditions such as earwax obstruction, ear canal collapse, fungal infections, eardrum perforations, otitis media, ossicular sclerosis, or acoustic neuroma can contribute to hearing loss.

  • Disease or Drug Effects: Certain diseases like mumps, measles, syphilis, urticaria, cardiovascular disease, and diabetes; or long-term use of ototoxic drugs such as high-dose aspirin, diuretics, antibiotics, etc., can affect hearing.

  • External Force Injury: Falls or accidents resulting in head trauma can damage the eardrum or ossicles, leading to hearing loss.

  • Noise Exposure: Prolonged exposure to environmental noise or loud headphones can harm auditory cells. Once damaged, these cells do not regenerate.

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Types of Hearing Loss

Types of Hearing Loss:

  • Conductive Hearing Loss: Often caused by obstructions such as earwax buildup, tympanic membrane perforations, middle ear effusions, ossicular chain disruptions, or infections like otitis media. These conditions can frequently be addressed with medical or surgical interventions.

  • Sensorineural Hearing Loss: Results from damage to the inner ear or auditory nerve, often due to prolonged exposure to loud noise, genetic factors, aging, ototoxic medications, or conditions like acoustic neuroma.

  • Central Hearing Loss: Occurs within the central auditory pathways in the brain. It may stem from neurological disorders or brain injuries and can lead to difficulties in processing auditory information, affecting memory and comprehension.

  • Mixed Hearing Loss: A combination of conductive and sensorineural hearing loss, where both the outer or middle ear and the inner ear or auditory nerve are affected.

Early Symptoms and Signs of Hearing Loss:

  • Difficulty in Hearing Sounds: Often, individuals may not hear or clearly hear the doorbell or telephone ringing. It’s common for someone to not hear or respond when called from behind.

  • Challenges in Noisy Environments: There may be trouble hearing what others are saying in restaurants or noisy places. On the phone, conversations can be unclear, necessitating a higher volume to understand.

  • Changes in Music Perception: Familiar music may sound different than before, indicating a change in auditory perception.

  • Volume Adjustments: Family members might frequently ask to lower the volume on the television or radio, as it may be too loud for them.

  • Speech Clarity: Words may seem unclear, requiring others to repeat themselves. In group discussions, it can be difficult to follow or hear clearly.

  • Loudness Complaints: Others may complain that you speak too loudly, which could be a sign of hearing loss.

  • Rustling Sound Test: Placing your thumb and index finger next to your ear and rubbing them together should produce a rustling sound. If you don’t hear this, it could indicate hearing loss.

  • Tinnitus: A persistent ringing or buzzing in the ears, known as tinnitus, can affect sleep or concentration and is often associated with hearing loss.

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Early symptoms & signs of hearing impairments

Definition of hearing impairment​


Complications of Hearing Loss:

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Hearing Damage and Brain Health

Hearing Loss and Accelerated Brain Atrophy:

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Dai3mimi : designed to overcome the limitations of traditional devices

Dai3mimi Material Conduction Technology

Sound Transmission Pathway

Innovative Hearing Aid Technology:

A novel material has been engineered, combining metal and plastic, to facilitate the direct transmission of sound waves through the skull to the inner ear. This design bypasses the outer ear, eardrum, and middle ear, areas prone to infection and damage. Consequently, this approach enhances sound clarity and simplifies auditory processing for individuals with hearing impairments. It is versatile, catering to a spectrum of hearing aid requirements, from mild to severe.

Our proprietary “push” hearing technology actively delivers natural sounds to the user without amplification, significantly enriching their auditory experience. This is particularly advantageous for seniors experiencing cognitive hearing loss.

Air Transmission Pathway

Traditional Hearing aids Technology

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Material Conduction Technology

Amplify the sound pressure

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Ear Drum > Middle Ear > Inner Ear

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