The three have this in common:
- Balance
- Stimulation of hair cells that generate impulse carried by the vestibular branch of cranial VIII.
in water dolphins have sharp hearing they use echolocation ........ in air both nocturnals bats and owl have sharp hearing owls uses tuff feathers to amplified sound bats uses ear holes and also the moths have sharp hearings too.... inland cats have best hearing they can rotate their ears 180 degrees maybe dog have sharp hearing compared to human but it can out race by cats ........
Sight, hearing, touch and smell
The Human hearing limits decays with age naturally. By the time you are over 30 your hearing may drop to a maximum rage of 0-15kHz. This is known as Presbycusis. There are many factors which cause this but the most common is hearing loss is caused by disorders of the inner ear or auditory nerve.
At the threshold of hearing the sound intensity is 10-12 watts per square meter equivalent to 0 dB. Our eardrums are moved by sound pressure variations and so are microphone diaphragms. Forget the intensity! At the threshold of hearing the sound pressure is 2x10-5 pascals or 2x10-5 newtons per square meters, equal to 0 dBSPL.
A hearing aid
semi-circular canals for dynamic equilibrium and vestibule for static equilibrium
No, hearing aids cannot correct the destruction of receptor hair cells.
spiral organ of Corti
houses hearing and equilibrium receptors
Can a person lose its equilibrium
inner ear
The inner ear
Organ of Corti
The cranial nerve responsible for both equilibrium and hearing is the vestibulocochlear nerve (CN VIII). It has two main branches: the vestibular branch, which is associated with balance and equilibrium, and the cochlear branch, which is associated with hearing.
The dynamic range of hearing refers to the range of sound intensities that the human ear can perceive, from the quietest sound that can be heard to the loudest sound that can be tolerated without causing damage. In general, the dynamic range of human hearing is about 120 decibels, with the threshold of hearing around 0 decibels and the threshold of pain around 120-130 decibels.
The cochlea contains hearing receptor cells called hair cells. These cells convert sound vibrations into electrical signals that are sent to the brain via the auditory nerve for processing.
Mechanoreceptors are the type of sensory receptor used to detect a stimulus in the special sense of hearing. These receptors respond to mechanical stimuli such as vibrations in the environment that are produced by sound waves.