Alternative
names sometimes used are sound-touch and audio-tactile
These
tactile concurrents tend to be pleasant or neutral rather than troublesome or
painful, although these latter reactions are sometimes possible.
Auditory-tactile synesthesia appears to have an emotional component and it
might be connected in some way to emotions triggered by the music, although
studies are needed to determine whether this is so. In any case, the tactile
sensations are highly specific, they are consistent and idiosyncratic (unique
to each synesthete) and they are different from phenomena such as frisson or
ASMR that affect many people, synesthetes and non-synesthetes alike, and which are
not considered a type of synesthesia (see below for more information on these
two phenomena and others).
Some characteristics of auditory-tactile synesthesia:
It is consistent. Basically, the same sound heard under the same circumstances tends to evoke the same synesthetic tactile reaction (although there is little research on this subject).
The degree of focus and relaxation is important: the tactile response tends to be strong and well-defined when the synesthete is relaxed and concentrating on the sound or music, and weaker or non-existent if they are concentrating on something else. Also, the experiences can be milder or not occur at all if the person is feeling tense and nervous but tremendously strong in a case of very deep relaxation, similar to a state of advanced meditation.
The quality of the sound also has an impact: both visual and tactile synesthesia tend to respond more strongly with good sound quality, listened to through good headphones, while a weaker response is caused by music that is distant or less surrounding.
The tactile effect can be cumulative: with certain types of music it can sometimes only start after many seconds or a few minutes, increasing in intensity as the same sounds repeat.
It can sometimes be accompanied by a perception of colour, i.e. that the tactile feeling created by the sound is of a particular colour.
It often coexists with auditory-visual synesthesia, giving rise to tactile and visual sensations at the same time.
What
kind of sounds evoke auditory-tactile synesthesia?
It
can be triggered by both musical and non-musical sounds, and it varies
from person to person. In many cases the sound of each musical
instrument is felt in a different part of the body or has its own specific tactile
sensation, which is always consistent, so the inducer in this case is timbre. Alternatively,
it may be specific to each song or musical genre. Although
apparently much less common, auditory-tactile synesthesia can also be prompted
by the different musical pitches (frequencies), keys or chords. There
are also people for whom voices are the main trigger. Electronic sounds (and electronic music) can create tactile concurrents
in many cases, and an example that tends to have a strong effect is autotune
used to synthesise voices. Depending on the particular synesthete, other factors that can have a
bearing are the degree of harmonisation, the tempo (and speed changes), the volume (intensity), and there can perhaps be a relationship with the emotion caused by a particular sound
or musical sequence. These last two examples should not
be confused with feeling vibrations from the music in your body or with
frisson, which are not synesthesia (for frisson, see below).
Types of synesthesia related to auditory-tactile
Mirror speech synesthesia
Some people with auditory-tactile synesthesia also experience another uncommon phenomenon, auditory-motor synesthesia, which consists of involuntary body movements
triggered by sound.
Sound-texture synesthesia
For people with this type, hearing different sounds produces a perception of textures. However, in practice the textures usually accompany another concurrent of their synesthesia – normally colour, shape, taste or touch sensations – rather than being evoked individually, so sound-texture might not actually not be a type of synesthesia per se. In any case it is different from auditory-tactile synesthesia as it does not involve real physical tactile sensations on the body. It can coexist with auditory-visual synesthesia for example, creating visualisations of textured colours, or shapes with both colour and texture, but in this case the textures are not felt physically on the hands or on other parts of the body, and it is these real physical touch sensations that are the hallmark of auditory-tactile synesthesia.
Go to the page on sound-texture synesthesiaAuditory-tactile
and sound-texture: projection and association?
Auditory-tactile
and sound-texture synesthesia have been compared to projective and associative
synesthesia respectively, auditory-tactile being the equivalent to a projected
visual synesthesia as it is actually felt physically and not just in the mind. This
is a very valid interpretation, although the terms “projective” and
“associative” are currently only used for visual synesthesias and not for those
with concurrents in the other senses.
Cross-modal
correspondences: something everyone can do
Up to a point, all of us are able to associate textures with sounds. These associations are called “cross-modal correspondences” (or "cross-modal associations”) because they involve two different sensory modes, but they are not considered synesthesia as they do not occur consciously. The differences are as follows:
A person
with sound-texture synesthesia: whenever they hear a particular sound they perceive a
texture. They see, feel or taste this texture, normally in conjunction with their other types of
synesthesia, and simply consider it to be one of the inherent properties of the
sound. This can happen with all sounds or just some, but the sound-texture pairings are consistent.
A
non-synesthete: they don’t normally perceive impressions of texture from sounds in
their day-to-day life and they never think about it. However, if asked they
would say that certain sounds correspond to certain textures rather than
others.
Similar phenomena that are NOT auditory-tactile synesthesia:
Frisson (goosebumps or shivers of pleasure on listening to music). Frisson is quite common and is a feeling of “shivers down your spine” and in the back of your neck. It can also produce tears or laughter and a speeded up heartbeat. It is estimated that perhaps two-thirds of the general population are able to feel this reaction (Grewe et al., 2007). It isn’t synesthesia but a physiological response to the emotion caused by the beauty of the music, particularly when it surprises the listener. It doesn’t normally happen with non-musical sounds. It has been associated with people who are more open to experience.
This page last updated: 15 November 2022
I appreciate you giving such a comprehensive description of the way I experience this world. I feel sound exactly as described here and I’m so happy to find a resource to validate my condition.
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