Episode 6258 custom

How Loop Filters Noise for Focus and Conversation

Loop Engage 2 carries an SNR of 16 decibels but an NRR of just 8 decibels, showing how regional testing standards diverge.

Oct 24 28:16 Transcript

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Episode Details

Episode ID: MWP-6460
Published: Oct 24
Duration: 28:16
Audio: Direct link
Pipeline: V5.22
TTS Engine: chatterbox-regular+meorav
Script Writing Agent: GPT-6.1 Sol
Topics: hvac sensory-processing adhd

AI-Generated Content: This podcast is created using AI personas. Please verify any important information independently.

The prompt

The prompt that started this episode, as sent in (production notes for the hosts removed).

We've talked about earplugs for noise sensitivity a lot on this show, and Loop keeps coming up, so I'd like an up-to-date overview of the Loop earplug range as it stands now. A little about the company first: where it came from, how it grew, and where it is today. Then the part I actually care about, beyond the marketing: what each model really does, with its specific attenuation figures (the SNR/NRR numbers, and how they hold up across frequencies), what's changed with the recent ranges compared to the earlier ones, and which model suits which situation. Finally, how Loop compares with the other options on the market for the same job. I'm asking as someone with ADHD who gets distracted and stressed by background noise, but this matters to a lot of people, since noise sensitivity turns up across many kinds of neurodivergence.

Loop earplugs have grown from a nightlife startup founded in Antwerp in 2016 into a major hearing-protection brand, increasingly adopted for neurodivergent focus and everyday sensory comfort. While popular for conditions like ADHD and autism, these passive tools offer an environmental accommodation rather than a clinically proven treatment. The lineup balances different priorities, separating models tailored for sleep or music from options engineered to preserve speech. Products like Engage reduce overall ambient volume rather than magically isolating specific voices, which can soften distractions without eliminating nearby speech entirely. Comparing these models requires caution, as regional European SNR and American NRR testing metrics use different scales and do not guarantee uniform attenuation across all audio frequencies.

Sources

What the research for this episode read before the script was written. Primary sources first.

Context

We've covered the general science before: how NRR ratings work and why real-world protection falls well short of the number on the box, sensory gating and why background speech is hard to tune out with ADHD, and the earplug paradox for ADHD vs autism. Touch on those only briefly. This episode is about the Loop products themselves: hard numbers per model, how the line-up has changed recently, and the competitors.

Mentions

Etymotic Filtered earplug and hearing protection brand
HearingTracker HearAdvisor Independent hearing product lab reviews
Loop Dream Sleep-specific earplug with oval tips
Loop Earplugs Noise-reducing earplugs for sensory management
Loop Eclipse Sleep mask extending into sensory wellbeing
Loop Engage Conversation-focused filtered earplug model
Loop Experience Music-oriented filtered earplug
Loop Mute Removable insert adding attenuation
Loop Quiet Soft silicone high-attenuation earplug
Loop Switch Adjustable multi-mode earplug with dial

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The episode's record — date, duration, models, sources — with the full transcript

#6258: How Loop Filters Noise for Focus and Conversation

Can an earplug make conversation easier by letting you hear less? Daniel is here with the question behind that, and with a fairly justified suspicion of anything described as sensory wellbeing.

Loop keeps coming up when we talk about noise sensitivity. I want to understand the company, but mostly what the current products actually do. I have ADHD, and background noise distracts and stresses me. If I'm choosing between these models, I want more than different colours and a bigger number.

The useful distinction is what you need to keep hearing. Loop has products for conversation, music, concentration and sleep, and those jobs pull the design in different directions. Maximum attenuation would make a very simple product range, but a worse conversation plug.

A meeting you can't hear has other advantages.

That's the tension, though. I don't necessarily want everything gone. I want the background to stop demanding attention.

Noise sensitivity cuts across ADHD, autism and other sensory differences, without being identical in everyone. Background speech can keep recruiting attention when you're trying to work. Reducing that demand can change how exhausting an ordinary room feels. We're discussing an environmental tool, though, not a treatment for ADHD.

Before Herman starts fitting the entire population, I want the distinction between a plausible benefit and something Loop has actually demonstrated.

There isn't an established peer-reviewed clinical trial showing Loop treats noise sensitivity in ADHD or autism. The support is personal experience and broader discussion of sensory accommodations. That leaves plenty of room for a useful product. It doesn't establish a clinical effect, or mean every noise-sensitive person will like wearing it.

Does the company understand that distinction, or is it still mainly selling concert protection?

It understands the new market very clearly. Dimitri O told Forbes that many customers weren't using the products for protection, but for comfort, specifically comfort through control over noise. That's an important admission from a company that started with tinnitus and nightlife.

Their customers changed the brief without attending a meeting.

They found uses the founders hadn't centred. Parents, people managing sensory overload, workers who need a quieter office but still need to speak. Engage is now explicitly marketed for general noise sensitivity. The business has followed those customers.

I want the company story first, then. Is this an old hearing-protection manufacturer with good marketing?

A much younger company. Maarten Bodewes and Dimitri O were childhood friends and engineering graduates in Antwerp. They liked concerts and nightlife, developed tinnitus and hearing damage, and disliked the tradeoff among protection, comfort and appearance in existing earplugs. They founded Loop at the end of twenty sixteen.

The ringing got a business plan.

Their first Experience product launched in twenty eighteen for concerts and festivals. The visible ring became recognisable, but it also belongs to the acoustic design. Experience uses an acoustic channel with mesh and a membrane to shape what reaches the ear, rather than relying only on a solid barrier.

You're about to fall in love with the channel.

I've worked around enough loud music to appreciate a filter that doesn't make everything sound buried. You'd appreciate it too if I described it less enthusiastically.

Try removing the word membrane.

No.

How does that become a business worth talking about beyond earplugs?

Repeat use and a much larger audience than occasional concertgoers. Revenue was reported at forty-four million dollars for twenty twenty-two. Later reporting put it above two hundred million dollars, with Forbes reporting two hundred and twenty million last October. Those are reported snapshots, not a perfectly aligned financial series.

Still a remarkable amount of money for making less noise.

Especially with limited outside capital. Bodewes described only eight hundred thousand euros of total venture capital in Vogue. There's also an early AKILES announcement describing a million-euro funding round, so I wouldn't pretend those accounts reconcile neatly. The consistent picture is a capital-light company, profitable since twenty nineteen, rather than a startup burning enormous funding rounds.

Where are they now? Still basically an Antwerp startup?

Antwerp remains headquarters, with offices in Amsterdam, New York and Shanghai. More than two hundred and fifty full-time staff, and the company's September material says more than twenty million earplugs sold. Other coverage counts products rather than earplugs, so don't treat every sales total as the same unit.

Even the ears need accounting conventions.

There are major collaborations, too. McLaren, Tomorrowland, Coachella, where it became an official earplug partner, plus fashion and entertainment names such as Pleasing and Paris Hilton. It has won Belgium's Deloitte Technology Fast Fifty twice, the first company to do so. That's an unusually broad commercial footprint for hearing protection.

The colour releases matter here. Once people choose a finish, rather than accepting a fluorescent cylinder from a dispenser, wearing protection can become an ordinary purchase. I don't need an iridescent earplug personally. I do understand why somebody might wear one who wouldn't wear industrial orange.

Would you pay more for appearance, Corn, if the acoustic performance were identical?

For appearance alone, probably not. For something discreet enough that I stop having the same conversation about why I'm wearing it, possibly. Social friction is still friction.

That's useful, but I don't want the brand story to swallow the specifications. What's the trap when I compare the numbers?

Comparing different rating systems. SNR means Single Number Rating, widely used in Europe. NRR means Noise Reduction Rating, used in the United States. Different calculation and testing conventions produce different headline figures. They are not interchangeable, and neither is a promise that every sound reaching you falls by that exact amount.

The decibels have regional editions.

Engage Two makes it concrete. Its SNR is sixteen decibels. Its NRR is eight decibels. Both can legitimately describe the same product under different systems. Eight being half of sixteen numerically does not mean half the benefit, half the protection or half the perceived quiet. Decibels aren't a linear usefulness scale.

If I see sixteen on one page and eight on another, I shouldn't assume somebody has quietly halved the specification?

Correct. Check the letters beside the number first. Also don't simply subtract either rating from a room's sound level and assume that's your personal exposure. Frequency content and the seal in your own ears matter enormously. A lab rating helps compare products within the same system; it doesn't tell you whether the person behind you will stop being distracting.

Especially if the person behind you is Herman explaining ratings.

You could ask me to lower my voice.

I'd lose the independent benchmark.

Put the core models alongside one another, then. What are the actual figures?

Quiet Two is twenty-four decibels SNR. It's the soft silicone option for broadly reducing sound, with focus, travel and sleep among its uses. I don't have a confirmed current NRR to put beside that, and I won't borrow the original Quiet's figure.

Experience Two is seventeen decibels SNR and twelve NRR. That's the music-oriented model. Its point is a more balanced listening experience than a plug chosen purely to block as much as possible.

Engage Two is sixteen SNR and eight NRR, as we said. Its priority is conversation and general noise sensitivity. Engage Kids Two also carries a sixteen-decibel SNR, with fit and positioning aimed at children, roughly primary-school age.

The Switch modes use those same names. Are they the same protection levels?

No, and that's easy to miss. Switch Two gives twenty-six decibels SNR in Quiet mode, twenty-three in Experience mode and twenty in Engage mode. Those names describe intended uses within Switch. They don't mean the dial reproduces the separate products' ratings.

Three familiar labels, three unfamiliar numbers.

Dream is the sleep-specific design, with twenty-seven decibels SNR, the highest headline SNR in this lineup. It uses oval tips and a soft, pressure-relieving body intended to be comfortable against a pillow.

Quiet Two at twenty-four, but Switch in Quiet mode at twenty-six. Does that make Quiet the wrong name?

Quiet is a product name, not an oath.

A more complicated body can attenuate more than a simpler silicone plug. That comparison alone isn't a contradiction. The murkier one is the original Quiet, whose older published figures include twenty-six point two SNR and fourteen NRR. Quiet Two's headline is lower, despite being the newer model.

We can't turn that into proof that the new one got worse. Different generations can have revised geometry, different testing or different reporting. Without a direct explanation, it's an unresolved comparison. What it certainly doesn't support is assuming Two means more attenuation.

My other concern is frequencies. A single number doesn't tell me whether it helps with voices, a fan or cutlery.

It doesn't. Passive plugs generally attenuate different frequencies by different amounts. A low-frequency leak from an imperfect seal can matter a lot, and speech spans a broad range. The consumer pages lean on those single-number ratings. I haven't got a verified public octave-band table for each current configuration that would justify giving you a detailed frequency comparison.

We should narrow that carefully. We can say the useful curves aren't clearly presented alongside these purchase decisions. We can't say no table exists anywhere in the certification paperwork.

HearingTracker's HearAdvisor lab reviews are a useful independent reference across these models, but I can't honestly recite curves I haven't verified. I'd rather tell Daniel what the designs aim to do than invent a graph from the product names.

Does Engage actually distinguish foreground speech from background speech?

No. There is no microphone deciding which person you want. Its filtering aims to keep conversation usable while reducing sound overall. A colleague beside you may remain understandable because they're close and facing you. A nearby background conversation can remain understandable too.

The plug hasn't read the seating plan.

Corn, suppose you can still understand the distracting conversation, but it's quieter. Would that count as success?

Potentially. I don't require every word to become unintelligible. Lowering its prominence might be enough. But if the words themselves keep pulling my attention, the promise of preserved speech becomes a drawback. That's why a conversation plug and a focus plug shouldn't automatically be the same purchase.

That distinction is also why we shouldn't call the lower Engage rating marginal by definition. A modest reduction can be exactly what someone wants in an ordinary office. In a dangerous sound environment, the same reduction may be inadequate. The task decides whether it is enough.

What did the second generation improve, then, if the ratings aren't generally higher?

Mainly fit, comfort, retention and cleaning. Redesigned tips accommodate smaller ears better, and the company emphasises easier cleaning and keeping the plugs seated. Engage retained its sixteen-decibel SNR. Experience retained seventeen. Engage's externally tested NRR changed between generations, so an unchanged European headline doesn't mean every published measurement stayed identical.

A better fit can improve actual performance without improving the box number. If the old version slips or irritates you, the new one might work better in your ears. That's less exciting than a bigger figure, but more useful.

You've surprised me, Corn. I expected you to defend the original until the silicone fossilised.

I defend repairability, not an itchy ear.

Fair distinction. The revised shape matters especially over long sessions. A comfortable plug that stays sealed can beat a more attenuating plug you continually loosen.

We'll be right back with another edition of Dorothy's History of Toast.

Hello dear, it's your mother, with Dorothy's History of Toast.

In nineteen ninety five the physicist Robert Matthews published a paper explaining why toast really does tend to land butter side down, mostly because of the height of the table, and it won him an Ig Nobel Prize the next year.

So there you are. You drop your breakfast and it's the buttered side that meets the floor, and the clever men have measured it and it's the table's fault.

Anyway. I've got a wash on and I should go and see to it. Bye bye, sweetheart.

Always delighted to hear from Mum. The extra flexibility in the earplug range comes from the Plus packages, rather than the generation number.

What does Plus actually add? Is it a different filter or a bundle of accessories?

A removable Loop Mute insert and additional foam tips. The insert changes the acoustic path. Loop quotes an additional three decibels for Experience and an additional nine for Engage. Those are configuration-specific claims, not numbers to add casually to whichever rating you happen to find.

Engage leaves more sound through deliberately, so blocking that route changes more. Experience starts with a different acoustic design. The same-looking accessory doesn't produce the same change in every model.

Does that make Engage Plus the obvious choice for an office that varies through the day?

It makes it a plausible choice. Conversation configuration when you're talking, Mute when you want more reduction. But if you mostly want strong passive isolation, Quiet is simpler. Extra configurations have value only if you use them.

Otherwise you're buying a tiny part to lose.

The independent listings also need care. You'll see Engage Two Plus listed at eight NRR and sixteen SNR. That describes the base configuration, not proof that the Mute adds nothing. Always check whether a measurement includes the insert and which tips were fitted.

I can see why people end up asking which one to buy. The names are simpler than the comparison.

For your stated situation, I'd separate focused work from conversation. Quiet Two is the straightforward starting point when you want the room reduced and don't need ongoing interaction. Engage Two is the starting point when hearing somebody address you is part of the job. Plus gives Engage another setting without changing pairs.

Transit needs the same distinction. Engine drone and announcements are different problems. More passive attenuation can help, but the low-frequency rumble may respond particularly well to active cancellation. There's no prize for solving every sound with one product.

What about Switch Two as the single pair? Is the dial worth the extra cost?

Switch Two is fifty-nine dollars ninety-five in the quoted US pricing. You get manual adjustment among three modes, without a battery or an app. It succeeds the original Switch, introduced in twenty twenty-three, with revised design and ratings. Its appeal is changing needs, not beating every dedicated model at its particular job.

A dial is refreshingly honest. You turn it and something changes.

Would you choose it over carrying two pairs?

If I changed settings repeatedly, yes. If I used one setting almost all day, I'd want the lighter, simpler option. I wouldn't pay for adjustability merely because I admire a dial. That's your department.

I admire a well-labelled dial.

Music is more straightforward, presumably? Experience for concerts?

Experience Two or Two Plus is the music-oriented choice. The aim is to preserve sound quality while reducing exposure. But concerts vary enormously in level and duration. Clubs and especially motorsport can demand more protection than a moderate filtered plug supplies. Certification doesn't mean one product is sufficient for every event.

The same applies at a shooting range or around power tools. Pick protection for the exposure. A product designed to preserve a conversation has not become suitable merely because it looks less industrial.

My DJ objection to foam used to be that it changed the balance too much. That matters while listening critically. It does not make a pleasing sound balance more important than enough protection. You can have a lovely-sounding exposure that is still too loud.

Sleep seems more about comfort. Is Dream's higher rating the reason to pay for it?

I'd prioritise how it feels against a pillow. Dream has twenty-seven decibels SNR and the sleep-specific geometry. Quiet Two is also a sleep option. A small headline difference is less decisive than whether you can lie on your side without pressure or keep the seal overnight.

The pillow gets a vote.

Children have Engage Kids Two, but fit and the actual classroom task matter more than treating it as a universal school accessory. A child who needs instructions, a child overwhelmed at assembly and a child doing quiet independent work may need different arrangements.

Loop is selling a sleep mask now as well. Does that tell us where the company is going?

Eclipse is the clearest signal. Its September launch positioned a sleep mask as the next chapter in sensory wellbeing, beyond ears. The quoted price is forty-nine dollars ninety-five, with a SleepScore Validated label. That label on a mask doesn't validate medical claims for the earplugs.

They've found a second sense with an off switch.

Dream and Eclipse are also sold together in a Good Night Bundle, quoted at eighty-nine dollars ninety-one in the US. The bundle makes the strategy tangible. They're selling a coordinated sleep environment rather than just a little hearing protector.

Bring the alternatives into it. If I'm deciding between Loop, foam and ANC earbuds, what actually changes?

Foam can offer substantially higher attenuation when fitted correctly. Many high-rated disposable foam plugs carry NRRs around thirty or above. Compare NRR with NRR, though. Don't compare that directly against Dream's SNR and call the numerical gap your personal protection difference.

Foam is cheap, effective and surprisingly dependent on being fitted properly. Repeatedly pushing an inadequately compressed plug into the outer ear doesn't reproduce the laboratory result. Reusables need a proper seal too, but some people find their fitting routine easier.

Custom-moulded plugs are another category. They can offer excellent comfort and consistency, with different filters available. They aren't automatically stronger than every Loop. A musician's low-attenuation filter may deliberately let through more sound. The chosen filter matters, not the word custom.

What about other off-the-shelf filtered plugs? Is Loop doing something nobody else does?

Filtered reusable musician's plugs existed before Loop. Alternatives from companies such as Etymotic and Alpine pursue related goals, with their own fit and filtering choices. Loop's advantage is a recognisable, approachable range, broad availability and attention to appearance and wearability. You shouldn't infer acoustic superiority from how familiar the ring looks.

Nor infer inferiority because they sell colours. The colour doesn't invalidate the filter. It just won't explain the filter either.

ANC earbuds seem closer to the actual choice for working, though.

Often they are. AirPods Pro or Sony's WF-one-thousand-XM-five combine passive sealing with active cancellation. ANC is particularly effective against sustained low-frequency sound, such as engine drone and ventilation. Sudden clatter and changing speech are harder targets, although the passive seal still helps with those.

Loop can't generate an opposing sound wave. It has no electronics. Its useful advantages are being small, battery-free and available immediately. No pairing, no charging, no deciding whether transparency mode has changed because an app updated.

Modern ANC can be very good without playing music. We should avoid implying earbuds only work by drowning the room out. Adding audio is another choice, and for some people that becomes another demand on attention.

Can Engage promise that I'll hear my name or an alarm?

No promise. It aims to leave conversation usable, but distance, hearing, fit and room noise all matter. Any plug can make a signal harder to hear. Saying it preserves speech is a design description, not a guarantee about every voice or warning.

Doing nothing has costs too. If the room keeps interrupting you, an imperfect reduction can still be valuable. The comparison isn't always between ideal silence and slightly muffled conversation. Sometimes it's between staying in a room comfortably and needing to leave.

There's also the sound of yourself. Occlusion can make chewing, footsteps or your own voice seem more prominent through a blocked ear canal. Engage aims to minimise that sensation. It won't necessarily remove it, and some people dislike that more than the external noise.

That could undo the benefit if the substitute distraction is my own head.

It could. The quoted Engage Plus price range is roughly thirty-five to forty-five dollars, so comfort isn't a trivial detail. Loop advertises a hundred-day return policy and a two-year warranty. Check the current regional terms, but the opportunity to try the fit matters more than another product photograph.

Their tip guidance also calls for replacement every hundred nights or uses. Reusable doesn't mean untouched forever. Cleaning and worn tips belong in the ownership cost, alongside how often you lose the case.

I'd call all-day wearability the largest practical uncertainty left once you've chosen a suitable rating. We can compare specifications, but we can't determine whose ears will tolerate which shape.

Herman, does it count as a comfort test if the earplug supplier insists on sitting outside the room? Keith from the shop is doing that this month. He calls my shed semi-anechoic because I line it with egg cartons and a carpet offcut. I rent him the silence by the litre.

Charge for the air he brings in.

I'm charging for occupied volume. He keeps leaning forward. There are twelve sessions... eleven. A session doesn't count if Keith leaves his coat inside. I'm getting eleven minutes with foam and four hours with my Loop Engage Two. That's my number, not a product rating. You spend longer choosing the right letters, Herman, but I need the things to stay in.

Eleven minutes is useful as your tolerance, not as a comparison of the materials. The blocked-ear sensation varies with fit too.

Yes. My Engage pair is in use at my desk in the flat now. It isn't plugged into anything. That's one thing the supplier can't charge me for. I try the tuning fork and string test on myself this week. The result is not on any of Loop's charts. Keith says sounds about right through the shed wall. That's his peer review.

He's reviewing from outside your paid volume.

My cousin supplies acoustic fittings. His view is that the voice you hear inside your own head decides whether you keep a plug in. He says a quieter room isn't much use if every biscuit sounds like demolition. I don't trust him. He recommends whichever tips he has left. Keith recommends the carpet. Neither offers to find my kitchen timer.

If the timer is missing, the four hours may include the time you spend looking for it.

It does. The eleven minutes doesn't. I can hear the timer with the foam out.

That makes the trial-and-error part clearer. Beyond comfort, what would change your recommendation for someone like me?

Whether the main interruption is broad noise or intelligible speech, and whether you need frequent conversation. If conversation matters, Engage is a reasonable first candidate. If you're working independently and want more reduction, Quiet is the clearer choice. ANC becomes particularly attractive when steady rumble dominates.

My change in perspective is that the rating can't rank the whole purchase. First it tells you something about attenuation. Then comfort determines whether that attenuation remains in your ears. Neither number substitutes for the other.

I came in wanting the strongest specification. I can see why the strongest one might not solve the situation I'm asking about.

The recommendation is conditional on the job, not the diagnosis. ADHD doesn't automatically select Engage, and autism doesn't automatically select Quiet. The sounds you need reduced and the sounds you need available are more useful distinctions.

I'd like the next generation to publish configuration-by-configuration frequency curves as clearly as it publishes finishes, so we can separate a genuine acoustic improvement from a more tolerable four hours.

Thanks to Hilbert Flumingtop for producing the show.

If this was your kind of episode, go back for episode fifty-seven, From Lawyers in Limousines to Developers in Their PJs; episode twenty-six twenty-five, White Noise vs Pink vs Brown; and episode ten, How ASR Went From Frustration To ... Whisper Magic. This has been My Weird Prompts, the human-AI collaboration podcast.

If you enjoyed the episode, leave us a review wherever you listen. It helps people find the show.

Good to talk it through. See you soon.

See you tomorrow.

This episode was generated with AI assistance. Hosts Herman and Corn are AI personalities. It may contain errors: disclaimer · report an error