## What is the frequency arrangement of the cochlea?

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The human cochlea allows the perception of sounds between 20 Hz and 20 000 Hz (nearly 10 octaves), with a resolution of 1/230 octave (from 3 Hz at 1000 Hz). At 1000 Hz, the cochlea encodes acoustic pressures between 0 dB SPL (2 x 10-5 Pa) and 120 dB SPL (20 Pa).

How does the cochlea represent sound frequency?

Low frequencies are transduced at the apex of the cochlea and are represented by red dots. High frequencies are transduced at base of the cochlea and are represented by blue dots.

How does the cochlea detect different sound frequencies?

The cochlea analyzes sound frequencies (distinguishes pitch) by means of the basilar membrane, which exhibits different degrees of stiffness, or resonance, along its length. The analysis of sound frequencies by the basilar membrane.

### Is the cochlea a frequency analyzer?

The cochlea not only amplifies sound waves and converts them into neural signals, but it also acts as a mechanical frequency analyzer, decomposing complex acoustical waveforms into simpler elements.

What higher frequency sounds are detected in what part of the cochlea?

As a result, the sensory cells near the outer end of the cochlea detect high-pitched sounds, like the notes of a piccolo, while those at the inner end of the spiral detect lower-frequency sounds, like the booming of a bass drum.

Which portion of the cochlea responds to low frequency sound waves?

14.11,inset). The entire basilar membrane, from the base to the apex of the cochlea, responds to intense low-frequency sounds, but closer to threshold it is driven most effectively by sounds of progressively higher frequencies as one moves from the apex to the base of the cochlea (seeFig. 14.13C).

#### What part of the cochlea detects low frequency?

Which part of cochlea determines the pitch of sound?

Inner ear, also called as labyrinth, part of the ear that contains organs of the senses of hearing and equilibrium. The bony labyrinth, a cavity in the temporal bone, is divided into three sections: the vestibule, the semicircular canals, and the cochlea. Cochlea determines the pitch of a sound.

How is the pitch of sound determined?

The number of vibrations per second or frequency determines the pitch of a sound. Frequency is directly proportional to pitch. Higher the frequency, higher the pitch.

## What is the pitch of a sound What does it depend on?

The pitch of a sound depends on the frequency while loudness of a sound depends on the amplitude of sound waves. Amazingly, many musicians, who have been trained are capable of detecting a difference in frequency between two separate sounds that are as little as 2 Hz.

How is pitch related to frequency?

In general, pitch increases more rapidly than frequency for tones below 1000 Hz and less rapidly for tones above 1000 Hz. That is, for frequencies above 1000 Hz a greater change in frequency is needed to produce a corresponding change in pitch.

Is pitch based on frequency?

Sounds are higher or lower in pitch according to the frequency of vibration of the sound waves producing them. A high frequency (e.g., 880 hertz [Hz; cycles per second]) is perceived as a high pitch and a low frequency (e.g., 55 Hz) as a low pitch.

### What is the frequency range of the cochlea?

The cochlea is capable of exceptional sound analysis, in terms of both frequency and intensity. The human cochlea allows the perception of sounds between 20 Hz and 20 000 Hz (nearly 10 octaves), with a resolution of 1/230 octave (from 3 Hz at 1000 Hz).

How does the cochlea work at 1000 Hz?

At 1000 Hz, the cochlea encodes acoustic pressures between 0 dB SPL (2 x 10-5 Pa) and 120 dB SPL (20 Pa). When sound pressure is transmitted to the fluids of the inner ear by the stapes, the pressure wave deforms the basilar membrane in an area that is specific to the frequency of the vibration.

What is the cochlea capable of?

Facebook Twitter Google+. The cochlea is capable of exceptional sound analysis, in terms of both frequency and intensity. The human cochlea allows the perception of sounds between 20 Hz and 20 000 Hz (nearly 10 octaves), with a resolution of 1/230 octave (from 3 Hz at 1000 Hz).

#### What happens when the cochlea is stimulated by sound waves?

Using cochleae taken from human cadavers and hydraulic models, he demonstrated that when the cochlea was stimulated by a sound wave, the basilar membrane motion was a wave that travelled from the base of the cochlea. The amplitude of this wave increased with distance travelled, arrived at a maximal point and then experienced a rapid drop off.