Sound-insulated curtains are used to block out noise
Moondream cannot be declared universally superior based on the available directly comparable evidence. Check the exact model, documented test conditions, panel dimensions and current price before choosing.
Moondream vs Absolute Zero at a glance
| What to compare | Moondream sound-insulating curtain | Eclipse Absolute Zero |
|---|---|---|
| Primary positioning | Multilayer sound-insulating curtain; some variants also provide blackout and thermal features. | Blackout curtain with seller-described noise-reducing and thermal benefits. |
| Published acoustic evidence | The manufacturer publishes different figures for specific products and tests; its pages include results up to 10 dB and up to 16 dB under different named test information. Verify the exact model and report. | The current linked listing describes noise-reducing benefits but does not state a directly comparable dB figure. The older site copy referred to a Thermaback-vs-sailcloth test, which is not a head-to-head test of these exact curtains. |
| Blackout | Available on selected Moondream models; verify the variant and product specification. | Absolute Zero is specifically marketed as blackout; coverage at the sides and top still matters. |
| Choosing by fit | Check the selected model’s width, drop, lining and installation instructions. | Check the exact panel size and current availability; pack configurations and size options can vary by listing. |
| What neither can guarantee | Neither product alone seals the window frame or guarantees a fixed real-world reduction in every room. Curtains are supplementary treatments, not replacements for repairing gaps or using suitable secondary glazing. | |
Which should you choose?
- Prioritize documented acoustic performance: choose only after matching the exact curtain model to its test conditions and installation. Do not compare headline decibel figures from different tests as though they were a direct contest.
- Prioritize blackout: compare the blackout specification, exact panel dimensions and window coverage. Absolute Zero is marketed specifically for blackout; Moondream also sells variants combining acoustic, thermal and blackout functions.
- Noise is still getting through the window: check seals and frame gaps first. If more isolation is needed, consider a fitted secondary-glazing insert. See our guide to reducing window noise.
Frequently asked questions
Are soundproof curtains completely soundproof?
No. They may provide supplementary noise reduction and room-comfort benefits, but results vary with the product, the fit, the amount of coverage and the window assembly behind the curtain.
Does the higher published Moondream figure prove it is better?
No. The cited figures refer to different manufacturer-described models or test setups, and they are not a verified head-to-head comparison with the exact Absolute Zero curtain linked here.
Should I buy on brand name alone?
No. Check the current product model, dimensions, fabric construction, relevant test documentation, availability and price for the area you need to cover.
In this article, I’ve focused on two popular brands that provide these products.

Moondream sound-insulating curtains

Moondream describes its sound-insulating curtain as a multilayer product combining dense fabric layers with an insulating middle layer. The brand publishes acoustic test figures for specific products and configurations. Its current product page reports up to 10 dB under a Kietudes test using EN ISO 10052, while its broader technology page cites results up to 16 dB for a stated CEBTP test report. These figures should not be treated as interchangeable or applied to every Moondream curtain: check the exact model and test details before comparing results.
Moondream also markets blackout and thermal functions. Those benefits depend on the specific curtain and installation; a curtain cannot seal gaps around a window frame or replace secondary glazing. See the current Moondream soundproof curtain listing and the manufacturer’s test and technology notes for model-specific information.
Check Moondream curtains on Amazon
For acoustic performance, consult the test data for the exact Moondream model rather than relying on brand-level slogans.
Moondream offers several curtain technologies, and their construction and tested performance differ by model. Check the maker’s current specification for the exact product before comparing acoustic or thermal claims. View Moondream curtain options on Amazon.
Eclipse Absolute Zero blackout curtains

Eclipse markets Absolute Zero as a blackout curtain with noise-reducing and thermal benefits. The current Amazon listing for the linked Kylie Absolute Zero panel describes blackout coverage and noise-reducing benefits, but does not provide an equivalent, clearly comparable decibel result in the product details reviewed for this comparison. We therefore do not rank it below or above Moondream based on a single numerical claim.
The earlier comparison text also referenced a test of an Eclipse Thermaback curtain against ordinary sailcloth using pink noise above 125 Hz. That is a different comparison and does not establish a universal performance figure for every Absolute Zero model or a head-to-head result against Moondream. Confirm the exact curtain variant, panel dimensions, mounting coverage and currently available product documentation before purchasing.

Check Eclipse Absolute Zero availability on Amazon
Conclusion
Neither curtain should be treated as a complete soundproofing solution. Curtains may provide supplementary noise reduction when well-fitted and generously covering the window, but results depend on the exact product and the window assembly. If outdoor noise remains intrusive, start by checking frame and sash gaps, then consider a fitted secondary-glazing insert or a window upgrade.
However, if you think you may need more blocking, you should read my blog on How to soundproof windows yourself.
Good luck and happy soundproofing!