Harmonic-Frontier-Audio/Pressed_and_Constricted_Phonation_Preview

Harmonic Frontier Audio – Pressed and Constricted Phonation (Preview, v0.9)

A high-fidelity human vocal dataset designed for AI training, speech research, and expressive voice modeling.

Pressed and Constricted Phonation (Preview), created by Harmonic Frontier Audio, provides a compact reference set demonstrating the quality, formatting, and metadata conventions used in the Harmonic Frontier Audio Human Vocality Primitives series.

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🔎 Summary

This dataset provides high-quality, rights-cleared recordings of pressed and constricted phonation — high-effort vocal behaviors characterized by elevated vocal-fold tension, reduced airflow efficiency, dense harmonic structure, narrowed resonance, and sharply defined onset behavior.

The full dataset encompasses:

• sustained pressed phonation across low, mid, and high register zones
• sustained constricted phonation across low, mid, and high register zones
• dense harmonic profiles with reduced airflow
• narrowed resonant qualities relative to neutral modal phonation
• sharp-onset pressed and constricted gestures
• abrupt-onset pressed and constricted gestures
• onset-focused examples across low, mid, and high registers

These characteristics make the dataset valuable for AI speech and voice modeling, phonetics research, phonation classification, effort- and tension-aware synthesis, vocal onset modeling, and human-aligned vocal control systems.

Developed by Harmonic Frontier Audio, this preview follows The Proteus Standard™ for dataset provenance, transparency, and ethical AI use.
Learn more about the Proteus Standard → https://harmonicfrontieraudio.com/proteus-standard

Full dataset details and licensing information are available at:
https://harmonicfrontieraudio.com/datasets/pressed-constricted-phonation

If you find this dataset useful, please consider giving it a 🤍 on Hugging Face to help others discover it.

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🔊 About Pressed and Constricted Phonation

Pressed phonation is a high-effort voicing regime associated with elevated vocal-fold tension and reduced airflow, producing a dense, compressed harmonic character.
Constricted phonation similarly involves narrowed vocal-tract or laryngeal configuration, creating a tighter resonant profile than neutral modal voicing.

The dataset also isolates sharp and abrupt onset behaviors, capturing how these high-tension phonation states establish themselves at the beginning of a vocal gesture. Sustained and onset-focused conditions are represented across low, mid, and high register zones.

These phenomena are foundational to:

• phonation-type and vocal-effort classification
• expressive and controllable voice synthesis
• modeling high-tension or compressed vocal states
• vocal onset and attack analysis
• comparative study of modal and non-modal phonation
• acoustic research into airflow, harmonic density, and resonance narrowing

This dataset presents a neutral, non-linguistic, non-performative representation of pressed and constricted phonation.
It is not designed to encode semantic speech content or dramatic vocal performance, but rather to isolate acoustic primitives underlying high-effort voicing, narrowed resonance, and onset behavior.

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📂 Contents

Audio Files (.wav)

• Recorded at 96 kHz / 24-bit WAV format
• Exported as mono
• Fade-ins and fade-outs of 3–5 ms applied for consistency
• No compression, normalization, or creative processing applied
• High-pass filtered at ~40 Hz to remove subsonic rumble

This preview includes 3 representative audio files, selected to demonstrate:

• low-register sustained pressed phonation with high laryngeal tension, reduced airflow efficiency, dense harmonic structure, and a narrowed resonant profile
• mid-register pressed phonation with a sharp onset, emphasizing concentrated onset energy and immediate high-effort voicing
• high-register pressed phonation with a sharp onset, demonstrating the same compressed onset behavior in a higher register zone

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Metadata (.csv)

Includes structured fields for:

• file name
• sound source type
• airflow type
• phonation type
• gesture and articulation descriptors
• microphone and recording chain
• sample rate, bit depth, and dataset version

Metadata follows the Harmonic Frontier Audio – Foundations schema.

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🎤 Recording Notes

• Recorded in a treated studio environment using a single-mic setup:
  • Microphone: Rode NT1-A condenser microphone
  • Recording chain: Rode NT1-A → Zoom F8n Pro
• Captured at 96 kHz / 32-bit float, rendered as 96 kHz / 24-bit mono WAV for release.
• Performer positioned approximately 3.5 inches from the microphone, with the microphone approximately 10–15 degrees off-axis.
• Sustained pressed and constricted phonation was recorded at approximately 4–6 seconds, with onset-focused gestures approximately 2–4 seconds.
• Exact pitches were not prescribed; performances were organized by low, mid, and high register zones.
• Brief rests were used between conditions to limit fatigue during the high-effort phonation tasks.

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🌈 Spectrogram Preview

Below is a spectrogram illustrating the dense harmonic energy, compressed spectral profile, narrowed resonance, and concentrated onset energy characteristic of pressed and constricted phonation:

⚡ Usage

This preview pack is designed for:

• Evaluation of Harmonic Frontier Audio dataset quality and structure
• Testing AI and DSP systems that model vocal effort, phonation type, resonance constriction, and onset behavior
• Research in phonetics, speech synthesis, vocal-effort classification, and non-modal phonation
• Creative and technical applications involving dense, compressed, high-tension vocal textures

👉 Note: This is not a full dataset.
The complete Pressed and Constricted Phonation dataset includes sustained pressed and constricted phonation across low, mid, and high registers, together with sharp and abrupt onset gestures for both phonation types across all three register zones, and is available for licensing.

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💡 Full Dataset Availability

This is a preview pack of the Pressed and Constricted Phonation Dataset.
The complete dataset is available for commercial licensing.

For licensing inquiries:
📩 info@harmonicfrontieraudio.com

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📥 How to Use This Dataset in Python

You can load the Parquet-converted version of this dataset directly with the datasets library:

from datasets import load_dataset

dataset = load_dataset(
    "Harmonic-Frontier-Audio/Pressed_and_Constricted_Phonation_Preview",
    split="train"
)

print(dataset)

⚙️ Note: Parquet conversion and load_dataset() support will be available within 2–3 days of publication.

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🔗 Explore More from Harmonic Frontier Audio

• Human Vocality Primitives Series (Previews)
• Celtic Constellation Series (Previews)
• Extended Vocal Techniques Spectrum (Previews)
• Novelty Gems Cabinet (Previews)

(All datasets follow The Proteus Standard™ for ethical dataset provenance and licensing.)

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📜 License

Released under CC BY-NC 4.0.

• Free for non-commercial use, testing, and research
• Commercial licensing available via Harmonic Frontier Audio
• A formal rights declaration is included in this dataset bundle

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📧 Contact

Harmonic Frontier Audio
📩 info@harmonicfrontieraudio.com
🌐 https://harmonicfrontieraudio.com/

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🗒️ Release Notes

Version 0.9 (March 2026) – Initial Preview Pack release for Pressed and Constricted Phonation.
See CHANGELOG.md for detailed version history.

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Citation

If you use this dataset in your research, please cite:

Pullen, B. (2026). Pressed and Constricted Phonation Dataset (Preview) [Data set]. Harmonic Frontier Audio. Zenodo. https://doi.org/10.5281/zenodo.21990656

ORCID: https://orcid.org/0009-0003-4527-0178

BibTeX

@dataset{pullen_2026_pressedandconstrictedphonation_preview,
  author       = {Blake Pullen},
  title        = {Pressed and Constricted Phonation Dataset (Preview)},
  year         = {2026},
  publisher    = {Harmonic Frontier Audio},
  version      = {0.9},
  doi          = {10.5281/zenodo.21990656},
  url          = {https://doi.org/10.5281/zenodo.21990656}
}