Science Friday

How Death Metal Singers Make Their Extreme Vocalizations

December 30, 2025

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  • Death metal vocalizations involve significant activation of supraglottic structures (tissues and muscles above the true vocal folds), differing significantly from clean singing styles. 
  • Vocal scientists at the University of Utah are using advanced imaging (cameras, electrodes, MRI) to phenotypically map the anatomical structures used by death metal singers to produce their extreme vocalizations. 
  • Understanding the complex vocal mechanisms used by death metal singers has broad applications beyond music, potentially improving rehabilitation and treatment for various voice and swallowing disorders. 

Segments

Introduction to Vocal Science
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(00:00:00)
  • Key Takeaway: Death metal vocalists train voices to hit unique guttural registers requiring specialized technique.
  • Summary: The episode of Science Friday, “How Death Metal Singers Make Their Extreme Vocalizations,” focuses on the technique behind death metal screams. Vocal scientists are studying these singers to understand their extreme vocalizations. This research may offer insights for metalheads and improve treatments for vocal injuries.
Lab Methodology for Vocal Study
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(00:03:30)
  • Key Takeaway: Extreme metal vocalizing heavily activates supraglottic structures above the true vocal folds.
  • Summary: Extreme metal vocalists utilize a different pattern of vocalizing compared to other styles, involving more activation of tissues above the true vocal folds. Researchers use cameras inserted through the nose, muscle electrodes, and MRI scans to visualize and map the anatomical structures during screaming. This process helps define the specific structures and tissues involved in creating these sounds.
Demonstrating Vocal Taxonomy
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(00:05:29)
  • Key Takeaway: The ‘false chord scream’ is a relaxed, open technique built upon familiar sounds.
  • Summary: The research involves creating a taxonomy of death metal screams, starting with the ‘false chord scream,’ which is described as loose and relaxed. Mark Garrett demonstrated this scream, noting it builds on sounds people already know how to make. Another demonstrated tone involved significant arytenoid and epiglottal activation, resulting in a very low sound.
Cartoon Voice Technique
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(00:07:41)
  • Key Takeaway: Vocal coaches often use cartoon voices, like Kermit the Frog, to establish the anticipatory posture for extreme vocalizations.
  • Summary: A common teaching technique involves starting with a cartoon voice, such as ‘Hi-ho, Kermit the frog,’ and then adding distortion to achieve the desired sound. Mark Garrett also described a ‘cawing crow’ scream that requires manipulating the mouth resonance, sometimes by pulling on facial whiskers.
Source-Filter Model Application
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(00:08:54)
  • Key Takeaway: The drastic change in death metal vocal sound is often achieved by manipulating the vocal tract shape (filter) rather than solely increasing laryngeal muscle effort.
  • Summary: The sound modification relies heavily on the source-filter model, where filtering the sound by changing the vocal tract shape drastically alters the output. Techniques like the ’tunnel throat’ curl the tongue to modify the filter without requiring excessive work from the laryngeal muscles. The researchers were surprised by how beautifully and synchronously these artists manipulate their vocal tract shape.
Rehabilitation and Coaching
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(00:10:09)
  • Key Takeaway: Properly executed death metal screams do not inherently damage vocal structures, and this research informs broader clinical treatment protocols.
  • Summary: For the performers studied, the screams do not appear to damage vocal structures. The findings are crucial for educating clinicians, ENTs, and neurologists on these vocal mechanisms. This knowledge will significantly impact how rehab is approached for voice disorders, swallowing issues, and conditions like Parkinson’s disease.
Learning a Basic Scream
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(00:11:02)
  • Key Takeaway: The false chord mid-scream can be initiated by mimicking a natural throat clear and then projecting that sound forward.
  • Summary: Mark Garrett demonstrated teaching the basic false chord mid-scream by starting with an absentminded throat clear. The next step involves holding that throat-clearing rumble sensation in the front of the face, near the lips, similar to holding a piece of candy. This technique can then be gently barked to begin forming the desired vocalization.