How can a sound make us feel so much?

For many people, music can be just catchy noise or a distraction. For others, it is, with no better way to describe it, everything: goosebumps, chills, sounds that run through the body from head to toe, instrumentals that combine all kinds of resonances, and even spontaneous dancing. Something that can seem as simple as listening to a song can, in reality, trigger responses in the brain that we still don't fully understand, and cause completely different reactions in each person.

To understand this phenomenon and what it brings with it, we have to go back in time. The origin is a bit uncertain, since there are no archaeological records of things like musical instruments. However, thinkers like the philosophers Gottfried Herder and Herbert Spencer argued that music began when humans started using their voice as an extension of language, giving it different emotions, raising it, or drawing it out. On the other hand, for Jean-Jacques Rousseau, writer and philosopher, the essential element of music is melody. In it, human beings find their place, since melody is the home of song and, therefore, of emotional expression. According to him, music cannot imitate landscapes or scenes the way painting does. Instead, in his own words, through melody it "will stir in the soul the same feelings one experiences when seeing them" (Blanco-Tascón, 2025, para. 6).

Today, music is still a key part of culture and human life. It combines not only melody (sounds that play one after another) but also harmony (which regulates and links sounds together), meter (the rule of repetition), and rhythm (the result of all these elements combined). This might sound very technical, but music is more than just a sound we hear. From a psychological and neuroscientific point of view, listening to music involves several processes happening at the same time: emotion, perception, memory, and mood regulation.

Listening to music activates almost the whole brain at once, much like playing sports or learning a new language does. Dr. David Silberswei, a neurologist and psychiatrist at Harvard Medical School, mentions in an article from that same school that the areas involved include the temporal lobe, which helps process pitch and tone, and the amygdala, which handles intense emotions and, together with the hippocampus, plays a role in memory.

Music also triggers hormones and chemicals such as dopamine, which is linked to pleasure: the brain uses its reward system to anticipate stimuli it finds enjoyable. This would explain, for example, why we look forward to the chorus of a song or why we feel satisfied when a part we like finally arrives. Serotonin regulates mood, which is why our favorite songs or calm rhythms can lower stress and bring a sense of peace. Likewise, musicologist and philosopher Julius Portnoy found that sound can change certain biological functions, such as blood pressure, energy levels, and digestion; how much it changes depends on the type of music.

Beats per minute (BPM) can also affect how energized or relaxed we feel. Musical tempo is linked to how we perceive and experience emotions. Fast tempos tend to be associated with more positive emotions, while slow tempos tend to be linked to emotions like sadness and seriousness (Ying Liu et al., 2018). Even so, a song at 150 BPM can raise our energy and alertness, but if the lyrics talk about, say, a loss, and the song is tied to a painful memory, we can still feel sad despite the fast tempo.

Another important factor is that our brain is constantly producing electrical activity. That activity is organized into different patterns, classified by their frequency — in other words, how many cycles happen per second, measured in hertz (Hz). These patterns can be measured using a technique called electroencephalography (EEG), and the main ones are delta, theta, alpha, beta, and gamma waves, each linked to different mental states and activities. Delta waves, which have a very low frequency, mostly show up during deep sleep. Theta waves tend to appear during deep relaxation or drowsiness. Alpha waves, roughly between 8 and 13 Hz, have traditionally been linked to relaxed states while awake. Beta waves, which are faster, go along with moments of alertness and mental activity. And gamma waves, faster still, are related to different brain processes. It's important to understand that these waves don't represent specific emotions and don't work on their own: the brain combines different patterns depending on what we're doing and the state we're in.

Music can actually change these patterns. According to a Neurosity guide (Keller, 2026), a song's tempo, complexity, and other features can be linked to the changes seen on an EEG. For example, slow, calm music tends to be linked to more alpha activity, while fast or complex music tends to be linked to more activity in the frequencies tied to alertness and mental processing. In short, our brain doesn't just listen to music passively; it responds to its rhythms, changes, and structure, and that response can temporarily change its activity.

Brain waves matter because some of them are linked to mental states we go through every day. That's why, for example, studying tends to work best in a state of calm alertness, where we're awake and focused without being overly tense; relaxing, on the other hand, calls for lowering that alertness and settling into a calmer state. This doesn't mean a certain musical frequency can "switch on" a specific brain wave like flipping a light switch. Brain waves are patterns produced by the brain itself, and their presence depends on many different factors.

For this reason, saying "alpha waves help you study" would be an oversimplification. Concentration doesn't depend on just one brain wave: studying requires attention, working memory, the ability to block out distractions, and other mental processes. Music can influence these processes, but its effect also depends on the task, the type of music, and the person listening. So instead of looking for some magic frequency that makes the brain focus, it makes more sense to understand how certain sounds and types of music can help create the right level of alertness for whatever we're doing.

All of these elements combined can make some people get goosebumps, chills, or tears, or even notice changes in their breathing and heart rate, just from listening to a song. These experiences, known in research as music chills or frisson, tend to show up during moments of strong emotional intensity in a song — an unexpected shift, an instrument coming in, or a part the listener was waiting for. What's interesting is that these reactions aren't just a subjective feeling: some studies have recorded physical changes during these moments, such as changes in skin activity, which reflect shifts in the body's level of arousal (Mori & Iwanaga, 2017). This shows that listening to music can become an experience that involves both the brain and the body.

After understanding everything that happens in our brain when we listen to music, it's clear that music is not just a collection of sounds. It's a whole process in which what we hear connects, at the same time, with emotions, experiences, and memories. What's most interesting is that there's no universal formula for how music is felt: every brain experiences it differently. In the end, it's a world of its own — for some it will keep being just noise, and for others, once they understand the magic (and the science) behind it, it will become everything.

References

BabyRadio. (2014). El origen de la música - Baby Radio. Baby Radio. https://babyradio.es/2014/03/28/el-origen-de-la-musica/

Rodriguez, C. (2026). El Origen de La Música. Scribd. https://es.scribd.com/document/354376076/El-Origen-de-La-Musica

folk dance - Johann Gottfried von Herder and the idea of the folk | Britannica. (n.d.). In www.britannica.com. Retrieved August 9, 2026, from https://www.britannica.com/art/folk-dance/Johann-Gottfried-von-Herder-and-the-idea-of-the-folk

Blanco-Tascón, M. (2025). Cómo Rousseau cambió el rumbo de la música. The Conversation. https://theconversation.com/como-rousseau-cambio-el-rumbo-de-la-musica-245424

Ruder, D. (2020). Music and the brain. En hms.harvard.edu. Harvard Medical School. https://hms.harvard.edu/news-events/publications-archive/brain/music-brain

Bases neurobiológicas de la música - Anales RANM. (2020). In Anales de la Real Academia Nacional de Medicina de España. https://analesranm.es/suplemento/2018-supl/13502_supl01/13502sup01_art03

Liu, Y., et. al. (2018). Effects of Musical Tempo on Musicians’ and Non-musicians’ Emotional Experience When Listening to Music. Frontiers in Psychology, 9(2118). https://doi.org/10.3389/fpsyg.2018.02118

Neurosity. (2026). How Music Affects Brainwaves: A Frequency Guide. In Neurosity.co. Neurosity. https://neurosity.co/guides/music-affects-brainwaves-frequency-guide

Mori, K., & Iwanaga, M. (2017). Two types of peak emotional responses to music: The psychophysiology of chills and tears. Scientific Reports, 7(1). https://doi.org/10.1038/srep46063