Infrasound refers to a low-frequency sound: sound that has lower frequency, lower than the hearing range for human – which is 20 KHz. However, with enough volume, it can still be heard or felt. Hope (2009, p. 52) mentioned, “…sounds below 16Hz can be audible if there is sufficient volume.” and “a listener is more likely to become aware of other objects vibrating, feel the air from a speaker, experience physical responses…”. The difference between listening and hearing: Listening is when it triggers an activity in the brain upon hearing a sound. While hearing is when no activity is triggered in the brain. According to Hope (2009, p. 51), she mentioned “That is, listening requires a certain type of additional engagement from the brain that hearing does not.”. Infrasonic sounds can be in a form of music, where it does not need to be deafening or bold kind of music (Hope 2009, p. 52). Infrasonic music gives a unique structure to produce music through materials that cannot be seen, heard or reached (Hope 2009, p. 53). Hence, we can produce infrasonic music via various ways: creating a music that allows the listener to visualise an object or bring the listener to a different ‘place’ (Hope 2009, p. 53). A good example would be using bass as the source of sound, putting it in a hidden area in a room, playing vibrations from an earthquake. Then, the participant can enter with headphones and a blind fold. This is when the participant visualises a scenario of an earthquake in the mind – this is also a good example of listening, where a brain activity is formed.
This reading reminds us the importance of studying sound by knowing when we can use the different kinds of sounds efficiently and creatively in various ways: In films: It can help a film maker make his scenes realistic – an example would be creating catastrophic natural disasters such as earthquakes in the movie, 2012. When we watch a film, we are constantly moved by the sound produced in the film. Sound in movies come in various forms – music, effects or voice audio (The Los Angeles Film School 2017). These are crucial forms of sound in order to allow the audience to feel the realness in the film. Sound effects helps with this by designing soundscapes to add a meaning to what’s rolling on the screen (Pacific Cinémathèque 2012, p.1). As mentioned by Pacific Cinémathèque (2012, p.1), “For instance, high-pitched sounds, including screams or squealing tires, help to create a sense of anxiety, while low-pitched sounds, including the sounds of waves or the swinging of a door, can be used to create a sense of calm or mystery.”. Hence, the filmmaker plays with the pitch, tempo and volume to get a particular response from the audience. Infrasonic sound is frequently used in horror films, developed from novel-like descriptions (Morrow 2017). We can say that infrasonic sound has its significance and one of which is in films.
Personally, I have never heard of the term “infrasonic sound” until I was given a chance to read this text. It has helped me understand how infrasonic sound can be useful in various forms. While infrasonic sound may not be heard (understanding that it cannot be heard when played), but it can be felt physically. While doing my own research, I have also learnt that infrasonic sound can be used (when applied correctly) as ‘weapons’ in the military context (Littlefield 2016). In other words, infrasonic sound can be used aesthetically or dangerously.
One significant aspect I found important from the reading is when Hope (2019 p.56) mentioned, ‘A common description is that the music creates a “sensual” and “warm” experience in the body. In media making, whenever we want to create something, it shouldn’t be just for the sake of creating it but inducing feelings into our audience. For example, an Abe Sada performance received reviews from the audience such as “teeth chattering” and “chills” (Hope 2019 p.55).
With the emerging technologies that offer today the opportunity to capture high quality, high definition images and sound, and the editing computing technology available, offered by specialized services understanding your need, it is no excuse creating unique audio/visual works. We should not be limited to what we see but as media making professionals, research is important and that we should make use of the resources we have to create media.
References:
Hope, Cat 2009, ‘Infrasonic Music’, Leonardo Music Journal, Vol. 19, pp. 51-56
The Lost Angeles Film School 2017, accessed 25 August 2019, <https://www.lafilm.edu/blog/the-importance-of-sound/>
Pacific Cinémathèque 2012, ‘The Language of Film’, inPoint, pp. 1-3
Morrow, Justin 2017, ‘The Science of Silence: Disquieting Uses of Infrasound in Movies’, No Film School, accessed 25 August 2019, < https://nofilmschool.com/2017/06/disquieting-uses-infrasound>
Littlefield, Ryan 2016, ‘The psychoacoustic effect of infrasonic, sonic and ultrasonic frequencies within non-lethal military warfare techniques.’, littlefield.co, accessed 25 August 2019, < https://littlefield.co/the-psychoacoustic-effect-of-infrasonic-sonic-and-ultrasonic-frequencies-within-non-lethal-cf05e1fd8673>