Proper Use of Airflow

Vocologists frequently use phrases like “cushion the tone with air” or “let the voice float on the breath.” These images aim to elicit efficient, healthy vocal production. Understanding the underlying principles helps clarify these concepts.

The Language of Airflow

Pedagogical Imagery

Common phrases relating breath and sound include:

Air-focused:

• “Cushion the tone with air”
• “Let the voice float on the breath”
• “Ride the airstream”
• “Support on the breath”

Sound-focused:

• “Breathe the sound”
• “Connect tone with breath”
• “Sing/speak on the breath”

Quality descriptors:

• “Make the sound more airy/hooty/fluty”
• “Less air in the tone”
• “Cleaner onset”

The Discovery Process

These images take on specific meaning through:

1. Trial and error: Experimenting with variations
2. Sensory awareness: Recognizing bodily sensations
3. Auditory feedback: Hearing resulting sound changes
4. Teacher guidance: “Cold, warm, warmer, hot” reinforcement
5. Repeated experience: Solidifying the connection

The image alone is insufficient—students/clients must discover the associated sensation and outcome through guided exploration.

The Basic Principle

Unidirectional Flow Requirement

Ample air must be transported unidirectionally through the larynx if voicing is to be established and maintained.

This seemingly simple requirement has profound implications:

Insufficient airflow:

• Vocal folds cannot vibrate
• Pressed voice quality
• Excessive laryngeal tension
• Risk of vocal trauma

Excessive airflow:

• Breathy voice quality
• Inefficient energy conversion
• Incomplete glottal closure
• May indicate pathology

Optimal airflow:

• Clear, efficient voice
• Appropriate glottal closure
• Comfortable effort level
• Sustainable production

The Flow-Quality Relationship

Research by Leanderson and Sundberg (1988) demonstrates:

Flow rate correlates with voice quality:

These values represent averages; individual variation exists based on vocal intensity, pitch, and other factors.

Optimization Factors

Maximum Energy Conversion

One goal of optimal airflow is:

Maximizing aerodynamic-to-acoustic energy conversion

Efficient conversion requires:

• Appropriate vocal fold adduction
• Sufficient flow to drive vibration
• Proper vocal fold stiffness/tension
• Favorable glottal geometry

Inefficient conversion results from:

• Over-adduction (pressed phonation)
• Under-adduction (breathy phonation)
• Excessive laryngeal constriction
• Suboptimal vocal fold configuration

Minimum Disturbance of Natural Modes

A second goal is:

Allowing vocal folds freedom to execute natural vibratory patterns

Natural vibratory modes:

• Analogous to string or membrane vibration modes
• Depend on tissue properties and boundary conditions
• Optimize energy transfer from flow to vibration
• Produce characteristic spectral patterns

Mode suppression occurs with:

• Excessive compression (over-adduction)
• Extreme lateral tension
• Mucosal stiffening from edema or scarring
• Inappropriate aerodynamic loading

Consequences of mode suppression:

• Reduced acoustic power output
• Altered vocal quality
• Increased phonatory effort
• Potential for tissue trauma

Sensory Indicators

Vibratory Sensations

Evidence of effective energy conversion:

Chest/sternum region:

• Buzzing or vibrating sensation
• Indicates acoustic power in low frequencies
• Should feel effortless, not forced

Facial region:

• “Mask” sensations (cheeks, nose, forehead)
• Indicates acoustic power in higher frequencies
• Associated with resonance optimization

Tracheal region:

• Gentle vibration
• Indicates subglottal acoustic pressure
• Should not feel strained

Flow Sensations

Evidence of appropriate airflow:

Ease of flow:

• Air moves freely through glottis
• No sensation of blockage or strain
• Breath seems to “carry” the sound

Laryngeal comfort:

• No squeezing or gripping sensation
• Throat feels open and relaxed
• Phonation feels sustainable

Common Problems

Breathy Voice (Excessive Flow)

Acoustic characteristics:

• Prominent noise component
• Reduced harmonic strength
• Wasted air (short phrases)

Mechanical cause:

• Glottal gap during phonation
• Incomplete vocal fold closure
• May indicate:
  • Technique problem (inadequate adduction)
  • Muscular weakness
  • Vocal fold pathology (nodules, polyps, paralysis)

Airflow measurement:

• Typically >0.20-0.30 L/s
• Can exceed 0.50 L/s in severe cases

Intervention approaches:

• Voice therapy for improved adduction
• Medical treatment if pathology present
• Strengthening exercises
• Posture and breath support work

Pressed Voice (Insufficient Flow)

Acoustic characteristics:

• Strained, tense quality
• Hard glottal attacks
• Limited intensity range

Mechanical cause:

• Excessive glottal compression
• Over-adduction of vocal folds
• Often accompanied by:
  • Supraglottic constriction
  • Elevated larynx
  • Excessive breath pressure

Airflow measurement:

• Typically <0.05-0.08 L/s
• May approach zero in extreme cases

Intervention approaches:

• Imagery encouraging ease (“float on breath”)
• Breathy onset exercises (gradual transition)
• Reduced breath pressure
• Whole-body tension reduction

Inconsistent Flow

Characteristics:

• Irregular voice quality
• Tremor or flutter
• Difficulty sustaining

Possible causes:

• Poor breath support coordination
• Neurological factors (essential tremor, aging)
• Psychological tension
• Incomplete skill development

Training Strategies

Establishing Awareness

Initial exploration:

1. Produce range of qualities from breathy to pressed
2. Identify sensations associated with each
3. Locate “optimal” point (clear, comfortable, sustainable)
4. Practice reproducing optimal quality reliably

Using Imagery

Effective images connect:

• Sensory experience (kinesthetic, auditory)
• Desired outcome (voice quality)
• Mechanical reality (even if imperfectly)

Examples:

• “Let the air do the work” → reduces over-adduction
• “Sigh out the tone” → encourages easier onset
• “Ride the breath stream” → maintains flow connection
• “Speak/sing into the mask” → balances resonance with flow

Monitoring Outcomes

Assess effectiveness by:

Primary (voice quality):

• Clarity and richness of tone
• Absence of strain or breathiness
• Appropriate loudness range
• Stylistic appropriateness

Secondary (comfort/sustainability):

• Ease of production
• Lack of fatigue
• Phrase length capacity
• Long-term vocal health

Tertiary (objective measures if available):

• Flow rate measurements
• Spectral analysis
• Aerodynamic efficiency
• Electroglottographic data

Integration with Other Aspects

Airflow optimization doesn’t occur in isolation:

Breath Support

Adequate subglottal pressure must:

• Drive sufficient airflow
• Maintain appropriate steadiness
• Adjust for intensity variations
• Coordinate with phrase requirements

Laryngeal Adjustment

Vocal fold configuration must:

• Allow appropriate flow
• Generate desired acoustic output
• Avoid excessive tension
• Adapt to pitch and loudness demands

Resonance

Vocal tract shaping must:

• Not impede airflow excessively
• Balance acoustic efficiency with flow requirements
• Create desired timbral qualities
• Coordinate with articulation needs

Summary

Optimal airflow management involves balancing two goals: maximizing aerodynamic-to-acoustic energy conversion while minimizing disturbance of vocal folds’ natural vibratory modes. This requires appropriate glottal adduction—avoiding both over-closure (pressed voice) and under-closure (breathy voice). Vibratory sensations throughout the vocal tract indicate effective energy conversion, while easy airflow and laryngeal comfort suggest appropriate vocal fold freedom. Pedagogical images succeed when they guide students toward this optimal balance through experiential discovery rather than mechanical prescription.

Key Takeaways

• ✅ Optimal airflow balances energy conversion efficiency with vocal fold vibratory freedom
• ✅ Breathy voice (>0.20 L/s) indicates inadequate closure; pressed voice (<0.08 L/s) indicates over-closure
• ✅ Vibratory sensations (chest, face, trachea) evidence effective aerodynamic-to-acoustic conversion
• ✅ Pedagogical images succeed by guiding experiential discovery of optimal balance

Related Topics

• Flow Resistance (Glottal Resistance)
• Pulmonary Power
• Why Teach Breathing?

Further Reading

1. Leanderson, R., & Sundberg, J. (1988). Breathing for singing. Journal of Voice, 2(1), 2-12.
2. McKinney, J. C. (1982). The diagnosis and correction of vocal faults. Nashville, TN: Broadman Press.
3. Holmberg, E., Hillman, R., & Perkell, J. (1988). Glottal airflow and transglottal air pressure measurements for male and female speakers in soft, normal, and loud voice. Journal of the Acoustical Society of America, 84(2), 511-529.