Key Points

• Pre-verbal vocalizations like humming, squealing, and shrieking are often intentional forms of communication, not just “noise” or “stimming.”
• Prosody and emotional intent allow parents to distinguish between a “sensory” sound and a “communicative” sound by listening to the pitch and rhythm.
• Vocal mirroring is a core DIR/Floortime technique that uses the child’s own sounds to build the first “circles of communication.”

In Camden, New Jersey, a mother recently described her son as having “a thousand voices.” To an outsider, the five-year-old was non-verbal, filling the house with a constant stream of hums, rhythmic clicks, and the occasional high-pitched squeal. To his mother, however, these weren’t just sounds. They were a second language. After months of careful observation alongside her therapist, she realized that the low hum meant he was concentrating on his blocks, while the sharp, rising squeal was a specific invitation for her to come and play.

For many NJ parents, the “non-verbal” label can feel like a silent room. But in the world of autism, “non-verbal” rarely means “non-communicative.” Long before an autistic child uses their first functional word, they are often using their voice to regulate their nervous system, express joy, or protest a change in their environment.

By applying the DIR/Floortime model, we move beyond waiting for “real words.” We look at the Individual-difference of how a child uses their vocal tract and help them turn these raw sounds into a shared dialogue. This article explores the typology of pre-verbal sounds and provides practical guidance for NJ families to start “reading” their child’s vocalizations.

The Hidden Vocabulary: Decoding Vocalization Typology

To understand a child in Princeton or Montclair, we must listen like a musician rather than a grammarian. We are looking for the intent beneath the sound.

1. Regulatory Sounds (Self-Soothing)

These are often rhythmic and repetitive, such as humming or low-frequency droning. In the Oller (2000) infant vocalization framework, these “protophones” serve to help the child maintain emotional balance. If your child is humming while walking through a crowded New Jersey mall, they are likely using the vibration of their own voice to “mask” the overwhelming external noise.

2. Expressive Squeals (The “Joy” Signal)

High-pitched squeals often represent “affective overflow.” The child is so excited by a sensory experience, such as bubbles popping or a favorite song, that the emotion “spills out” as a sound. This is a vital moment for Joint Attention (as discussed in Blog 4).

3. Shrieking and Protesting

A sudden, sharp shriek is often a “survival” sound. Paul et al. (2011) in their study on vocal communication in autism noted that these sounds often have a distinct prosody, meaning a pitch and intensity, that signals a need for immediate intervention or a change in the sensory environment.

The Science of Sound: Prosody and Meaning

In typical development, infants use “babbling” to practice the sounds of their language. In autism, vocalizations may follow a different path. Prosody, the rhythm, stress, and intonation of speech, is often the first place where meaning appears.

Research published in the Journal of Autism and Developmental Disorders by Paul et al. (2011) indicates that while autistic children may be delayed in using words, their use of vocal affect is often quite sophisticated. They might “sing” their requests or use a specific “grumble” that mimics the cadence of a sentence they have heard before, a form of vocal echolalia.

For families in Cherry Hill or Middletown, learning to listen to the music of the sound rather than searching for the words is the key to breaking the communication barrier.

The DIR/Floortime Approach: Vocal Mirroring and Connection

In a traditional speech therapy model, an adult might “correct” a child’s sound or prompt them to “say ‘apple’.” In DIR/Floortime, we do the opposite: we join the child in their sound.

The Power of Vocal Mirroring

Vocal mirroring is the act of imitating your child’s sounds back to them with a playful, “I hear you” affect. When you mirror a hum in a Ridgewood living room, you are telling the child: “Your voice has meaning, and I am listening.” Research on contingent imitation confirms that when caregivers mirror vocalizations, children with ASD show significantly increased social engagement and communication initiations.

• Creating a Circle: When the child hums, you hum back. If the child stops, looks at you, and hums again, you have just completed a Circle of Communication.
• Expanding the Sound: Once the circle is established, you can add a tiny variation. If they hum “Mmmm,” you might respond with “Mmmm-BOP!” This introduces the idea of shared problem-solving and creative play.

Strategies for NJ Parents

• Wait and Listen: Before jumping in to “interpret” the sound, just sit with it. What is the child’s body doing? Are they smiling? Are they tensing up?
• Contingent Responding: Ensure your response matches the child’s emotional state. If they are squealing with joy, your response should be bright and fast. If they are humming for regulation, your response should be low and calm.
• Avoid the “Quiet” Command: Unless a sound is physically hurting someone’s ears, try not to shut it down. In the Floortime model, every sound is a potential bridge to a word.

Parent Coaching: Validating the “Inner Language”

At Direct Floortime, we coach parents in Hoboken and Livingston to see themselves as “translators.” Your child is speaking; they are just using a different dialect.

The Role of Caregiver Affect

Your voice is a powerful tool for co-regulation.

• Rhythmic Entrainment: If your child is shrieking and dysregulated, using a low, rhythmic “shhh-shhh” or a melodic “I-know-I-know” can help their nervous system “sync” to yours. Porges’ Polyvagal Theory explains how a caregiver’s prosodic voice directly activates the child’s social engagement system.
• The “Social Engagement System”: Using a “sing-song” voice, known as parentese, helps the child’s brain prioritize your voice over the background hum of an NJ household. Studies show that prosodically varied speech significantly improves auditory attention in children with ASD.

Integrating Communication into the NJ Community

Helping a “non-verbal” child navigate the world in Lakewood or Teaneck requires advocacy and a deep understanding of their vocal “shorthand.”

Advocacy and Speech Goals

• Beyond “Functional” Speech: When working with your school’s IEP team, ensure that goals aren’t just about “requesting.” We want goals that recognize pre-verbal social engagement as meaningful communication under IDEA guidelines.
• Augmentative and Alternative Communication (AAC): Vocalizations are often the first sign that a child is ready for AAC tools like iPads or picture boards. Research by Romski and Sevcik (2005) demonstrates that AAC does not replace natural speech development but actively supports it. The sound shows the desire to communicate; the tool provides the means.

From Sounds to Sentences: The Developmental Path

Every word ever spoken began as a simple vocalization. By honoring your child’s squeals and hums today, you are laying the neurological foundation for the language of tomorrow.

Research on DIR/Floortime by Greenspan and Wieder (1997) consistently shows that children who engage in long chains of “vocal play” with their caregivers develop more robust and meaningful language skills over time. It isn’t about “training” the mouth; it’s about “engaging” the mind.

FAQs

Is my child’s “shrieking” always a bad thing?

No! Some children shriek when they are incredibly happy. Look at their eyes and hands. If they are relaxed and smiling, it’s a “joy shriek.”

Should I ignore “meaningless” humming?

In Floortime, nothing is meaningless. Even if it’s purely for sensory regulation, joining the hum can be a way to “be with” your child in their world.

Can mirroring lead to more “stimming”?

Actually, mirroring often reduces isolated stimming because it turns a solitary activity into a social one. Research supports that social contingency transforms self-directed behaviors into communicative exchanges. You are moving the sound from “self-talk” to “us-talk.”

How do I know the difference between a “word” and a “sound”?

Consistency is key. If your child uses a specific “baaa” every time they see a ball in a Jersey City park, that “baaa” is functionally a word!

What if the sounds are too loud for me to handle?

It’s okay to have boundaries. Use a “quiet voice” model or offer a “loud zone” in the house where all squealing is welcome.

Hearing the Heart Beneath the Hum

The sounds your child makes are the first chapters of their story. By listening with curiosity rather than frustration, you turn your New Jersey home into a laboratory of connection.

At Direct Floortime, we believe every squeal is an invitation. We help parents across NJ decode these vocal messages and turn “noise” into “negotiation.” Whether you are in Voorhees or Westfield, our team is here to help you hear what your child has been trying to tell you all along.

Contact Direct Floortime today to learn how to bridge the gap between vocalizations and verbal communication.