The Safe and Sound Protocol (SSP)
Developed by Stephen W. Porges
The Science Behind SSP
The Safe and Sound Protocol (SSP) is a five-hour, evidence-based listening intervention grounded in Polyvagal Theory.
Polyvagal Theory helps us understand that our autonomic nervous system is constantly asking: Am I safe? This process happens outside conscious awareness and is shaped by what Dr Porges calls neuroception — our nervous system’s moment-to-moment detection of cues of safety and danger.
When we feel safe, the ventral vagal system supports:
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Social engagement
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Emotional regulation
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Eye contact and vocal prosody
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Curiosity and connection
When we feel unsafe, we move into:
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Sympathetic mobilisation (anxiety, hypervigilance, fight/flight), or
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Dorsal vagal shutdown (collapse, numbness, disconnection)
The SSP works through the auditory system. The muscles of the middle ear help us detect the frequency band of human speech (approximately 1000–5000 Hz). When this system is under-functioning — often due to stress, trauma, illness, sensory sensitivities, or chronic vigilance — we may struggle to accurately interpret voice, tone and safety cues.
The SSP uses specially filtered, prosodic music to:
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Train the middle ear to better detect vocal frequencies
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Stimulate the ventral vagal system
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Support the social engagement system
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Reduce auditory sensitivity and defensive responses
It is not a “relaxation track.” It is a neural exercise program for the listening system and autonomic regulation.
For further background, see the Adult SSP Delivery Manual
and the e-book on effective processing and regulation
.
What SSP Can Support
SSP is not a cure for a diagnosis. It is a foundational regulation intervention. It may support
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Trauma recovery
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Anxiety and chronic hyperarousal
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Sensory processing differences
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Social engagement difficulties
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Emotional dysregulation
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Chronic stress patterns
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Therapy readiness
When the nervous system feels safer, other therapeutic work often becomes more accessible and effective.
How We Use SSP in My Practice
We begin with an autonomic conversation and intake, exploring
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Sound sensitivities
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Sensory preferences
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Nervous system tendencies (mobilisation vs shutdown)
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Current stressors and supports
We map your nervous system patterns and identify resources before we begin.
Listening is titrated. “Less is more” is a guiding principle.
Duration
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Total program: 5 hours
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Maximum: 60 minutes per day
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Often delivered in shorter segments (5–30 minutes), depending on your nervous system
We move at the pace of safety — not speed.
Headphone Recommendations
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Use over-ear headphones that surround the ear
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Noise-cancelling headphones are not recommended
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Earbuds are not recommended
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Bluetooth is fine if kept close to the device
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Bone conduction must be turned off
Volume should be set to the lowest comfortable level. Louder is not better.
Creating the Right Listening Environment
Visual
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Soft, dimmable lighting
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Avoid fluorescent flicker
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Gentle ambient light is ideal
Auditory
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Quiet space
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Minimise interruptions
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White noise outside the room if needed
Touch
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Comfortable clothing
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Blanket or weighted blanket if supportive
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Beanbag, firm chair, or floor — your choice
Movement
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Gentle rocking or slow pacing is fine
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Avoid vigorous exercise during listening
Smell
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Neutral environment
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Avoid strong perfumes
Interoception
Before listening:
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Use the bathroom
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Have water nearby
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Notice breath and heart rate
Safety is embodied, not cognitive.
What To Pay Attention To While Listening
Notice and gently track:
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Changes in breathing
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Shifts in temperature
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Fatigue
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Irritability
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Emotional waves
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Increased calm
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Improved eye contact
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Sound sensitivity changes
If you feel overwhelmed:
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Pause the music
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Orient to the room
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Take a few slow breaths
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Contact me
Do not “power through.” Regulation supports change; overwhelm closes the system.
After the SSP
Changes may unfold over 2–8 weeks.
You might notice:
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Easier social engagement
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Better eye contact
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Reduced reactivity to noise
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Improved sleep
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Greater emotional steadiness
It is recommended to wait 2–3 months before repeating the core program
SSP is designed to work with therapy, not replace it.
