Case Study: The Earworm Engineer

"I didn't just want people to watch my videos. I wanted my videos to follow them home."

Overview

This case study examines how Nia Brooks, a 16-year-old comedy and lifestyle creator, deliberately engineered audio elements — a signature sound, a catchphrase, and a recurring musical motif — to maximize memorability. Her "sonic brand" became so effective that viewers reported hearing her phrases in their heads involuntarily. This case explores the science of auditory memory, the ethics of deliberately sticky audio, and the line between "pleasantly memorable" and "annoyingly invasive."

Skills Applied: - Earworm design principles (simplicity, repetition, surprise within familiarity) - Sonic branding (intro sound, catchphrase, recurring sound effects) - Retrieval cues and environmental triggers - The mere exposure effect applied to audio - Ethical considerations of deliberately sticky content

Part 1: The Audio Void

Nia's Starting Point

Nia made comedy videos about the absurdity of everyday life — awkward interactions, overthinking mundane decisions, the inner monologue of a teenager trying to seem normal. Her humor was sharp, her delivery was excellent, and her videos averaged 180,000 views.

But Nia had no sonic identity. Her videos used trending sounds when they fit, original audio when they didn't, and nothing consistent across her channel. A viewer could watch ten of her videos and hear ten completely different audio environments.

"I noticed that when I asked friends 'what's my thing?', they could describe my humor but couldn't recall a single specific line or sound from my videos," Nia said. "My humor was memorable in the abstract but not in the specific. Nobody was quoting me."

The Diagnosis

Nia analyzed creators whose content was quoted and referenced in daily life. She found a pattern:

Every "quotable" creator had at least one audio element that existed independently of any specific video — a sonic fragment that viewers could recall, reproduce, and deploy in their own conversations. The fragment was the retrieval cue that kept the creator in active memory.

Nia had zero such fragments. Her humor was diffuse — funny throughout but nothing crystallized into a quotable, reproducible moment.

Part 2: Engineering the Earworm

Element 1: The Catchphrase

Nia needed a phrase that was: - Rhythmic: Natural to say aloud - Specific to her: Not used by other creators - Emotionally charged: Carried a specific feeling - Repeatable: Viewers could use it in their own lives

She experimented with several options:

The winning phrase had an additional property: it was functional in real life. Viewers could use "That's a me problem, but also a YOU problem" in actual conversations — when a friend did something annoying, when a situation was relatable, when assigning humorous blame. The phrase wasn't just a video catchphrase; it was a social tool.

Element 2: The Signature Sound

Nia designed a 1.5-second intro sound: a quick, ascending three-note chime (think: a xylophone playing do-mi-sol) followed by a single bass "thump."

Design rationale: - Simple: Three notes + one beat. Easy to reproduce by humming. - Surprise within familiarity: The ascending chime sets up an expectation of a fourth note; the bass thump violates it. The brain keeps "replaying" the unresolved sequence (earworm principle #4 — incompleteness). - Tonal match: The playful chime matched Nia's comedy energy; the bass thump grounded it. - Duration: At 1.5 seconds, it was short enough to not feel like a delay but long enough to register.

Element 3: The Reaction Sound

Instead of generic laughter or exclamations, Nia developed a specific vocal reaction for the punchline of her jokes: a drawn-out "Mmm-MMM" with rising intonation — like someone tasting unexpectedly good food while shaking their head. She used it specifically at the moment when the joke landed hardest.

The "Mmm-MMM" worked because: - It was physically distinctive (most creators use "haha" or verbal reactions) - It was associated with a specific emotion (that mix of disbelief and delight when something is too funny) - It was easy to imitate (two syllables, clear intonation) - It created a Pavlovian association: when viewers heard "Mmm-MMM," they knew they'd just experienced the best moment of the video

Part 3: Implementation and Results

The Rollout

Nia introduced all three elements simultaneously in a new video series. The consistency was crucial — the same intro sound, the same catchphrase delivery, and the same reaction sound in every video, without variation.

Adoption Timeline

Quantitative Results (12 weeks)

The "quote in comments" metric was the most telling. Almost 5% of all comments on Nia's videos contained her catchphrase — and the phrase appeared in comments on other creators' videos too, effectively functioning as free advertising embedded in the social layer.

The Involuntary Recall Effect

Nia's most interesting data came from a poll she ran asking followers: "Have you ever caught yourself saying 'that's a me problem, but also a YOU problem' in real life?"

Results: - 67% said yes - 41% said they used it "regularly" - 23% said a friend or family member had picked it up from them

And from a follow-up question: "Has Nia's intro sound ever gotten stuck in your head?" - 54% said yes - 19% said it had played in their head "for more than an hour"

The sonic brand had achieved involuntary recall — the audio elements were activating in viewers' minds without deliberate effort. The chime played in their heads when they saw content in a similar vein. The catchphrase emerged in conversations when the situation fit. Nia's audio had escaped her videos and become part of her viewers' internal soundtracks.

Part 4: The Ethics Question

When Sticky Becomes Invasive

After six weeks, Nia received a DM that made her think:

"Your catchphrase is stuck in my head and I literally cannot stop saying it. It's like a disease. I love your videos but am I going crazy?"

The message was humorous in tone, but it raised a genuine question: is it ethical to deliberately engineer audio that invades people's involuntary thought?

Nia consulted the chapter's framework and reflected:

The case FOR ethical concern: - The earworm effect is involuntary. Viewers didn't consent to having Nia's audio loop in their brains. - The mere exposure effect means repeated sonic exposure creates preference that feels organic but is actually engineered. - The line between "memorable" and "invasive" is crossed when the viewer can't control the recall.

The case AGAINST ethical concern: - Every musician, advertiser, and storyteller throughout history has designed for memorability. Earworms existed before TikTok. - The "invasion" is mild — a phrase or sound, not a harmful message. - Viewers chose to watch repeatedly; the repetition was consensual even if the specific memory effect wasn't. - The content itself is positive (comedy, relatability) — the earworm reinforces a good experience.

Nia's Decision

Nia decided on a principle: engineer for memorability, but never for dependency.

Her rules: 1. The catchphrase should enhance the viewer's life (giving them a funny phrase to use), not extract value (manipulating behavior). 2. The sonic elements should be associated with positive emotions only — no sounds designed to trigger anxiety, FOMO, or compulsive checking. 3. She would never use her catchphrase to promote something she didn't believe in — the trust embedded in the phrase carried responsibility.

"I think about it like perfume," Nia said. "You wear a signature scent so people remember you pleasantly. You don't wear it to hypnotize people. If someone smells your perfume and smiles, that's a good thing. If someone smells it and feels controlled, something's wrong."

Discussion Questions

1. The chapter argues that earworms work through simplicity, repetition, surprise within familiarity, and incompleteness. Which of these four principles was most important in Nia's catchphrase success? Which was most important for the intro sound? Are different principles more relevant for verbal vs. musical elements?

2. Nia's catchphrase became "cultural" — used by viewers in their own conversations and by other creators in their content. At what point does a catchphrase stop "belonging" to its creator? Is this a positive outcome (wider reach, cultural impact) or a risk (loss of distinctive association)?

3. 19% of polled viewers said the intro sound had been stuck in their head "for more than an hour." Compare this to the 2014 Facebook emotional contagion study (Chapter 4) — both involve involuntary psychological effects on viewers. Is there a meaningful ethical difference between planting an earworm and shifting someone's mood through feed manipulation?

4. Nia's sonic brand was designed simultaneously (all three elements introduced together). Would a phased rollout (one element per month) have been more or less effective? What does spaced repetition theory predict?

5. Some creators' catchphrases become annoying over time (mere exposure fatigue). How could Nia prevent her catchphrase from crossing the threshold from "pleasantly memorable" to "irritating"?

Your Turn: Mini-Project

Option A: Design a complete sonic brand for yourself or a hypothetical creator: - A 1-2 second intro sound (describe it in detail or record it) - A catchphrase (score it on the 4 criteria: rhythmic, specific, emotional, repeatable) - A recurring reaction sound or effect Test the catchphrase: say it to 5 people once and ask them to repeat it 10 minutes later. How many remember it perfectly?

Option B: Audit a creator who HAS a strong sonic brand. Identify each audio element they use consistently. Map when each element appeared in their timeline — was it designed or did it evolve naturally? How does the element function as a retrieval cue?

Option C: Research involuntary musical imagery (INMI) — the scientific term for earworms. Find 2-3 academic studies on what makes music sticky. Based on the research, design a 5-second audio clip optimized for maximum memorability, explaining each design choice with a scientific rationale.

References

• Note: Nia Brooks is a composite character based on real creator experiences. The earworm research references the work of James Kellaris, Vicky Williamson, and Kelly Jakubowski. The adoption timeline and metrics are illustrative of documented patterns in sonic branding for content creators.
• Kellaris, J. J. (2003). "Dissecting earworms: Further evidence on the 'song-stuck-in-your-head' phenomenon." Proceedings of the Society for Consumer Psychology, 220-222.
• Jakubowski, K., Finkel, S., Stewart, L., & Müllensiefen, D. (2017). "Dissecting an earworm: Melodic features and song popularity predict involuntary musical imagery." Psychology of Aesthetics, Creativity, and the Arts, 11(2), 122-135.