How Loud Is HOPSTAR, Really

By GETAUVE Editorial Team · Published October 21, 2026

How Loud Is HOPSTAR, Really

The spec sheet gives you one number, and your room gives you at least three.

What 45 dB means at one foot, through a closed door, and next to a tiled wall, plus the settings and rooms that change the answer.

The Short Answer

HOPSTAR measures about 45 dB at a mid setting, roughly the level of a quiet conversation in the next room. At level 1 it's lower, closer to 40 dB. Through a closed hollow-core door, expect a faint hum and nothing more. In a tiled bathroom, expect the same device to sound noticeably louder to anyone in the hallway.

45 dB Is a Measurement, Not an Experience

Decibels are logarithmic, and the numbers only mean something with a distance attached. A device rated at 45 dB is usually measured at 1 foot in a quiet room. At 3 feet the level drops by roughly 9 dB. At 10 feet, by about 20.

That's why two people can describe the same device as silent and loud and both be right. One is measuring at arm's length in a carpeted bedroom. The other is hearing it through a wall in an apartment with hardwood floors.

The useful comparison: 45 dB sits under normal conversation, near a quiet refrigerator, and well above the hum of a ceiling fan at low speed.

Distance Changes Everything

At 12 inches, 45 dB is audible in a silent room and easy to miss with any background sound. At 6 feet, with a door between you and the listener, it usually disappears into the room tone.

The variables that matter more than distance are the door and the floor. A solid-core door with a towel at the base reduces transmission substantially. A hollow-core door with a half-inch gap does much less.

If you share a wall, put the device on the side of the room away from it, and put something soft between the device and the wall. A bookshelf does more than a blanket. The difference is measurable: a full shelf of books absorbs mid-range sound in a way fabric doesn't.

Hard Surfaces Add About 5 dB

Tile, glass, and bare wood reflect high frequencies. A bathroom can add roughly 5 dB to what someone outside the door hears, which takes 45 dB into the range of a raised voice.

This is the single most common reason people report a device as louder than its rating. The device didn't change. The room did.

A bath mat, a towel on the counter, and a closed door recover most of that difference. Running the fan covers the rest, and it's a more effective mask than music at the same volume.

What Masking Actually Costs

Masking works best when the mask is steadier than the thing you're hiding. A fan, an air purifier, or a white-noise app at low volume does the job. Music with lyrics does not, because the ear tracks the words and notices gaps.

Volume matters less than consistency. A steady 40 dB hum covers a rhythmic 45 dB device better than a 55 dB playlist with quiet passages.

If you need to be genuinely inaudible, the honest answer is timing rather than volume. An empty house at 2 p.m. beats any masking setup at midnight. Late at night, sound carries further because the background noise floor drops, which is why the same device seems louder at 11 p.m. than at noon.

The Settings That Are Quietest

Level 1 is the quietest, at roughly 40 dB. The motor note rises with each of the 8 levels, and the difference between level 1 and level 8 is noticeable in the same room but much less so through a door.

Patterns add variation in pitch, and variation is what carries through walls. A steady level is easier to mask than a pulsing one, even at the same measured volume.

If quiet is the priority, choose a low steady level over a high patterned one. The measured difference may be 3 dB. The perceived difference is larger, because the ear notices change more than level.

One more variable worth knowing: hard floors carry sound into the room below. A rug under the bed does more for a downstairs neighbor than a towel under the door.

When Quiet Isn't the Priority

A quiet motor usually means a smaller motor, and HOPSTAR's 45 dB comes with a modest top end. If you want strong suction and don't care who hears, this isn't the device to optimize for. That's the trade-off: silence and power pull in opposite directions at this size.

Skip it if your walls are thin enough that any sound carries, because no 45 dB device solves that. And don't buy a quieter-rated model expecting a different experience; a 3 dB difference is real but small, and 40 dB is still audible in a silent room.

Sources

• National Institute for Occupational Safety and Health — reference levels for common environmental sounds.
• International Electrotechnical Commission — IPX7 rating and measurement conditions for consumer devices.
• Center for Devices and Radiological Health — general consumer labeling guidance.

This article is general education, not medical advice. If you have a health concern, speak with a qualified clinician.