Essay 4 - Sound and the Brain: How the Auditory System Gives Meaning to Sound
- Art of Hearing | Dyon Scheijen
- Jun 28
- 3 min read
LFG Handbook
Essay 4
Sound and the brain: how the auditory system gives meaning to sound
When people talk about sound, they often think of the ear first. The ear picks up sound waves, converts them into electrical signals, and transmits them to the brain. From this perspective, hearing seems like a relatively simple process: sound enters and is registered.
In reality, hearing is much more complex.
The auditory system does not function as a passive microphone. The brain constantly analyzes, filters, and interprets sound signals. This means that hearing depends not only on the physical sound but also on the way the brain processes that sound.
From ear to brain
When a sound reaches the ear, it is converted into nerve signals via the cochlea. These signals are then transmitted via various neural stations to the auditory cortex.
An initial selection already takes place during this process.
After all, the brain must constantly determine:
• which signals are important
• which signals can be ignored
• which signals might have a meaning
This selection process is largely automated.
The role of attention
An important mechanism in this process is attention .
The brain possesses systems that constantly determine which stimuli come to the foreground and which fade into the background.
In a busy environment, for example, people can follow a conversation while other sounds are barely noticed. The auditory system is therefore highly dependent on cognitive processes that determine where attention is directed.
However, when a sound is perceived as unusual, unfamiliar, or potentially threatening, the brain may focus attention on it more strongly.
As a result, a sound that was initially barely noticed can suddenly become much more prominent in perception.
The limbic system
In addition to attention, the limbic system also plays an important role.
This part of the brain is involved in emotional processing and in assessing stimuli based on their meaning for the individual.
The neurophysiological model of tinnitus describes how auditory signals can become coupled to emotional and autonomic systems in the brain (Jastreboff, 1990).
When a sound is classified as neutral by the brain, it will usually fade into the background.
However, when it is perceived as disturbing, threatening, or inexplicable, the brain may continue to monitor the signal.
Sound as a meaningful signal
The consequence of these mechanisms is that sound is never completely detached from meaning.
The brain constantly asks questions such as:
• What is this sound?
• Does it come from somewhere?
• Is it important?
• Do I need to do something with it?
When there is no clear answer to these questions, the brain can continue to follow the signal.
This can cause a sound to repeatedly attract attention.
Significance for low-frequency sound
This mechanism may play a role in reports of low-frequency noise.
When residents perceive a sound that is difficult to localize or whose source remains unclear, the brain may be inclined to continue monitoring the signal.
This does not mean that the sound is created exclusively by the brain. It does mean, however, that the way the brain processes the signal can influence the perceived burden.
That is precisely why it is important to approach sound experiences not only from the physical properties of sound, but also from the way the auditory system processes signals.
The place within The Hearing Triptych
Within The Hearing Triptych model, the brain represents the second dimension of sound perception.
Sound constitutes the physical signal.
The brain determines how that signal is processed.
The human experience ultimately determines what meaning the sound takes on within someone's life.
Considering these three dimensions together creates a broader perspective on sound perception.
Literature
Jastreboff, P. J. (1990). Phantom auditory perception (tinnitus): mechanisms of generation and perception. Neuroscience Research.
Cima, RFF, et al. (2012). Specialized treatment based on cognitive behavioral therapy versus usual care for tinnitus. The Lancet.
Scheijen, D. (2026). The Hearing Triptych: Sound, Brain and Human Experience.
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