The search stopped before the publication year
Details verified in the original abstract:
| Feature | Detail |
|---|---|
| Search cutoff | June 2022 |
| Design | Scoping review |
| Included evidence | 20 studies: 7 animal and 13 pediatric |
What the authors reported
The authors’ summary describes developmental concerns in animal research and broadly similar human findings, while noting possible sleep benefits with lower-intensity exposure. It does not give a single pooled estimate of developmental risk.
Keep those statements separate when reading a headline. A possible sleep benefit and a possible developmental concern involve different outcomes. One cannot settle the other simply by appearing in the same paragraph.
A scoping review helps describe the evidence available
The PRISMA explanation of scoping reviews describes their role in bringing evidence together and establishing the extent of a literature. Its reporting checklist asks authors to describe eligibility, sources, selection, study characteristics, and limitations.
For a reader, the useful question is not just “How many studies?” It is “What kinds of studies answered which questions?” A large collection can contain many observations that are only indirectly relevant to the specific decision you want to make.
PRISMA is a reporting framework. Its scoping-review checklist includes optional critical-appraisal items; mentioning the framework alone does not establish that every study received a quality rating. Reporting guidance.
How this differs from the earlier papers in our library
This is our comparison of research questions, not a reconstruction of the review’s included-study list. We have not verified which earlier papers were included in its synthesis.
| Paper | Focus | Read the explanation |
|---|---|---|
| 1990 trial | Falling asleep | Newborn settling |
| 2014 study | Machine output | Device measurements |
| 2021 study | Machines and apps | Volume and distance |
Three checks before applying a review to a baby
These are our reading checks, not a new quality score for the review or its individual studies.
- Check the population. Separate animal experiments, different childhood ages, and the group you want to understand. Do not relabel a combined participant count as babies in a sound-machine trial.
- Check the exposure. Look for the sound source, level, schedule, and setting. The phrase “noise exposure” alone cannot establish that two experiments studied the same conditions.
- Check the outcome. Identify whether a paper measured sleep, sound output, hearing, or development. Before accepting a causal claim, look for a design that can address alternative explanations.
What we reviewed and where to go next
We reviewed the indexed abstract, not the complete article or inclusion tables. We cannot independently assess the full search, study-level findings, or risk-of-bias work.
For the practical question you came with, see white noise and developmental concerns, overnight duration, or volume and placement. Those guides distinguish pediatric guidance from research findings and estimated measurements.
Common questions
Does a paper in a bibliography necessarily belong to the included evidence?
No. A reference may supply background or explain a method. Check the selection results and inclusion tables before calling it an included study.
Does a later review replace an earlier experiment?
A later synthesis and an original experiment have different roles. Read the original method when you need to understand what was measured; read the review to understand how its authors organize the wider evidence.
Can a review validate a particular sound app?
A commercial product needs evidence relevant to that product and the claim being made. Lullasure does not present this review as testing or endorsing its app.
Sources and updates
- De Jong et al. (2024): Continuous white noise exposure during sleep and childhood development — Original review abstract; DOI: 10.1016/j.sleep.2024.04.006.
- PRISMA: Scoping reviews and reporting guidance
- Spencer (1990), original trial abstract
- Hugh (2014), original equipment-study abstract
- Hong (2021), original publisher abstract
: First publication. Abstract access stated; prior-paper comparison identified as our own, with no claim of review inclusion.
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