Infrasound

Definition

Infrasound refers to sound waves that are lower in frequency than 20 Hz, which is below the threshold of human hearing. These low-frequency sounds can create a powerful impact on human perception and emotional response, making them a vital tool in sound design, especially in genres that rely on tension and atmosphere like horror and sci-fi. Utilizing infrasound can evoke feelings of unease or fear, enhancing the immersive experience for audiences.

5 Must Know Facts For Your Next Test

1. Infrasound is often used in horror films to enhance suspense and create a sense of dread, as it can induce feelings of anxiety even when not consciously perceived.
2. Scientific studies have shown that exposure to infrasound can lead to physiological responses such as increased heart rate and heightened stress levels.
3. In sci-fi sound design, infrasound can simulate alien or otherworldly environments, adding depth and realism to soundscapes that help transport the audience.
4. Infrasound can travel long distances through various mediums, making it effective for creating atmospheric sounds that don’t require direct auditory attention.
5. Sound designers must be careful with infrasound since it can cause discomfort or negative reactions in some individuals if overused or poorly integrated into the overall sound design.

Review Questions

• How does infrasound contribute to creating tension in horror films?
  • Infrasound contributes to tension in horror films by evoking feelings of unease and anxiety without the audience being fully aware of its presence. The low-frequency vibrations can resonate with the body's physical sensations, leading to an instinctual reaction that heightens the emotional impact of scary scenes. By incorporating infrasound into the soundtrack, filmmakers enhance the overall atmosphere, making viewers feel more immersed in the suspenseful environment.
• Discuss the role of infrasound in sci-fi sound design and how it enhances audience experience.
  • In sci-fi sound design, infrasound plays a crucial role by simulating alien environments and adding layers of complexity to soundscapes. The unique qualities of infrasound can create a sense of vastness or otherworldliness that aligns with the genre's themes. By using infrasound effectively, sound designers transport audiences into different worlds, evoking emotions that align with the narrative and visual elements of the film.
• Evaluate the potential health impacts of prolonged exposure to infrasound and its implications for sound design practices.
  • Prolonged exposure to infrasound has been linked to various health impacts such as increased anxiety, fatigue, and even nausea in some individuals. This raises important considerations for sound designers, as while using infrasound can enhance emotional responses, it must be applied judiciously to avoid discomfort among viewers. Balancing artistic intent with audience well-being is essential, ensuring that the use of infrasound contributes positively to the overall experience without crossing thresholds that could lead to negative reactions.

Related terms

Subbass: A frequency range below 60 Hz that is often used in music and sound design to create deep, resonant sounds that can be felt physically.

Acoustic Ecology:

The study of the relationship between humans and their environment through sound, often considering how infrasound interacts with natural phenomena.

Low-Frequency Noise: Unwanted sound at low frequencies that can affect human health and well-being, similar to infrasound but typically in a non-artistic context.