How is sound detected by the brain2 min readReading Time: 2 minutes
The auditory cortex is the part of the brain that is responsible for detecting and processing sound. This area is located in the temporal lobe, just above the ear. The auditory cortex is divided into two parts: the primary auditory cortex and the secondary auditory cortex.
The primary auditory cortex is responsible for processing basic information about sound, such as pitch and volume. The secondary auditory cortex is responsible for more complex tasks, such as understanding speech.
The auditory cortex receives input from the cochlea, a snail-shaped structure in the ear that is responsible for converting sound waves into electrical signals that can be processed by the brain. These signals are then sent to the primary and secondary auditory cortex, where they are processed and interpreted.
One of the ways the brain detects sound is by measuring the time it takes for a sound to reach each ear. This is known as the interaural time difference. When a sound is heard, the brain compares the time it took for the sound to reach each ear. If the sound is coming from the right side, the sound will reach the right ear first. If the sound is coming from the left side, the sound will reach the left ear first.
The brain can also detect sound by measuring the difference in pressure between the two ears. This is known as the interaural pressure difference. When a sound is heard, the brain compares the pressure of the sound waves in each ear. If the sound is coming from the right side, the pressure of the sound waves will be higher in the right ear than in the left ear. If the sound is coming from the left side, the pressure of the sound waves will be higher in the left ear than in the right ear.