Safe and Sound Protocol Therapy for Children

SSP is not talk therapy. It works at the level of the nervous system itself.

The Safe and Sound Protocol (SSP), developed by Dr. Stephen Porges, is a five-hour auditory intervention built on his Polyvagal Theory. The protocol uses specially filtered music to train the middle ear to tune into the frequency range of human speech, which is a range the nervous system uses as a biological signal of safety. When the nervous system consistently reads the environment as safe, it can shift out of chronic fight-or-flight or shutdown states and into the social engagement system, where learning, connection, and regulation become possible.

For children whose nervous systems are stuck in a state of defense, everyday sensory input, social situations, and even sounds that seem ordinary to others can register as threatening. This is called neuroception, the nervous system’s unconscious scanning for safety or danger, operating below the level of conscious thought. The SSP works directly on neuroception by giving the auditory system repeated, patterned signals of safety. Over time, the nervous system learns to rest.

The result is not sedation or suppression. Children who complete the SSP often become more regulated, more available for connection, and more able to engage with the therapies, learning, and relationships already in their lives. Think of it as preparing the soil before you plant: SSP creates the neurological conditions for everything else to work better.

Understanding why the SSP works helps you make an informed decision for your child.

Polyvagal Theory, developed by Dr. Stephen Porges, describes how the autonomic nervous system governs our responses to safety and threat. The theory identifies three distinct states: the ventral vagal state (social engagement, calm, regulated), the sympathetic state (fight or flight, hyperarousal), and the dorsal vagal state (shutdown, freeze, collapse). Many children with sensory processing differences, autism, ADHD, or anxiety profiles spend much of their daily lives cycling between sympathetic and dorsal vagal states, making it harder to learn, connect, and regulate.

The SSP targets this directly. The filtered music in the protocol exercises the stapedius muscle in the middle ear, which controls our ability to tune into the human voice frequency range. When that muscle is functioning well, the auditory system more readily picks up the prosodic, melodic cues in human speech that signal safety to the nervous system. Research published by Unyte, the organization that licenses SSP practitioners globally, shows outcomes across key regulatory domains:

• 85% of users showed improvements in social communication
• 81% showed reductions in auditory hypersensitivity
• 87% showed improvements in emotional regulation
• 84% showed reductions in anxiety symptoms

These are not outcomes from a single small study. They reflect data collected across thousands of SSP users by certified providers worldwide.

SSP is not a diagnosis-specific intervention, but certain profiles tend to benefit most.

The SSP is appropriate for children whose nervous system dysregulation is limiting their ability to learn, connect, or participate in daily life. Our certified practitioners use a thorough intake to determine whether SSP is a good fit before beginning the protocol.

Children who commonly benefit from the SSP include those with:

• Sensory processing differences, particularly auditory hypersensitivity or sensory defensiveness
• Autism spectrum profiles where social engagement and communication are areas of focus
• Anxiety, including separation anxiety, generalized anxiety, and situational anxiety responses
• ADHD with difficulty sustaining attention or shifting out of hyperarousal
• Trauma history or early adverse experiences affecting nervous system baseline
• Selective mutism
• Challenges with emotional regulation and frequent meltdowns
• Difficulty tolerating sensory environments like classrooms, grocery stores, or family gatherings

SSP works particularly well as a complement to occupational therapy, Floortime, and other relationship-based approaches because it creates the neurological conditions those therapies require. Many families notice that their child becomes more available for connection and learning after completing the protocol.

Our certified practitioners deliver SSP in a way that centers your child’s comfort and pace.

The SSP is a five-hour listening program, typically divided into shorter sessions over several days or weeks depending on your child’s tolerance and regulatory capacity. Some children can engage with 30-minute sessions from the start. Others need to begin with 5 or 10 minutes and build gradually. We follow your child’s nervous system, not a rigid schedule.

Sessions are delivered in a calm, low-stimulation environment, most often in your home, where your child already feels safe. During the listening, your child can engage in quiet, familiar activities: drawing, building, playing with sensory materials, or simply resting. The music plays through specific over-ear headphones that allow the filtering to work properly. We are present with your child throughout, observing regulation cues and adjusting the pace if needed.

After the protocol is complete, we provide follow-up support to help you and your child’s other providers integrate the changes. Many families choose to return for subsequent SSP rounds as their child grows and their goals evolve. We also offer SSP as a standalone service for families who are not yet enrolled in ongoing OT, and as an integrated component of a broader Therapeeps therapy plan.

We are happy to talk through your child’s profile before you commit to an evaluation.

The Safe and Sound Protocol is a specialized service, and we want you to feel fully informed before you begin. Call us and one of our certified SSP practitioners will walk you through your child’s history, answer your questions, and help you decide whether SSP is the right next step.

Therapeeps serves families across Mountain View, Palo Alto, Los Altos, Los Altos Hills, Sunnyvale, Cupertino, and surrounding Bay Area communities. Sessions are delivered in your home for your child’s comfort and best possible outcomes.