Questions, answered properly

Real cats, every time. Every purr on this channel is recorded from our own two cats, Alani and Monster, on a proper microphone in our own home. Nothing is synthesised, and nothing is a stock sound effect. If a session sounds slightly different from the last one, that is because it is a different day and a different cat mood.

Two brothers, and the entire talent roster. Alani is the Biscuit Master — he starts purring the second you look at him and kneads everything within reach. Monster is the Tiny Tiger, considerably louder than a cat his size has any right to be. He earned the name.

Most run around an hour, with some longer ones for overnight listening. They are built from genuinely different recordings rather than one short clip looped, so you are not hearing the same thirty seconds two hundred times.

Some sessions pair purring with a gentle background such as rain or a fireplace, and those are always named so you know what you are getting. The purring itself is never pitch-shifted, sweetened or layered with synthesised tones.

Plenty of people leave a session on a television while they read, work or wind down, and a sleeping cat in high detail is genuinely nice to have on the wall. If you are listening with your eyes shut, the audio is mixed to stand on its own.

No. The sessions are free on YouTube. If we ever make anything paid, it will be an extra rather than a wall around what is already there.

Low. A 2023 study measured domestic cat purrs at roughly 20 to 30 Hz, and the range most often quoted across cat species is 25 to 150 Hz. For comparison, 25 Hz sits below the lowest note on a bass guitar — it is a sound you feel as much as hear, which is part of why purring is so physically soothing to be near.

Honestly, this was rewritten recently. For decades the accepted answer was a "neural oscillator" in the brain telling the voice box to twitch about 25 times a second. Then in 2023 researchers at the University of Vienna showed a cat's larynx can produce purring frequencies with no brain signal and no repeating muscle contractions at all — special pads in the vocal folds do the work, in a way closer to the creaky "vocal fry" in a human voice. It has not settled the question completely, but the textbook answer is now known to be incomplete. Cats kept a secret from us for a very long time.

This is the question we get asked most, and we would rather answer it straight than sell you something.

The popular claim is that purrs sit at 25 to 150 Hz, that those frequencies are used in vibration therapy for bone and tissue healing, and that purring therefore heals. The first part is true. The problem is the leap at the end.

The frequency measurements everyone cites come from a conference abstract rather than a full peer-reviewed study, and all it showed was that purr frequencies overlap frequencies used in therapy. It never showed that purring heals anything.

There is also a gap nobody mentions. Vibration therapy works by pushing mechanical force into the body through a plate you stand or sit on. Listening to a purr is sound arriving at your ears. Even if vibration therapy were completely proven, it would not transfer to a video playing through a speaker.

So: we make no health claims. What we do know is that a great many people find purring calming, and that being around a cat you love is genuinely good for you. That is enough of a reason to press play.

More reasons than most people expect. Kittens purr within days of being born, when they are still blind and deaf — the mother's purr is a vibration they can find their way to, and their purr back tells her they are alive and feeding. Adult cats purr while being stroked, while eating, while grooming another cat, and sometimes while completely alone. It is closer to a signal meaning "all is well here, stay close" than a simple happiness meter.

No, and this is worth knowing if you live with one. Cats also purr when they are frightened, injured, at the vet, and sometimes while dying. It appears to be self-soothing, likely tied to endorphin release. Purring on its own is not proof your cat is fine — if something else seems wrong, trust that instead and call a vet.

Somewhat, yes. Researchers found that when cats want feeding they embed a high-pitched cry inside the purr, at a frequency uncomfortably close to a human baby's cry. People asked to rate these purrs found them more urgent and less pleasant — even people who had never owned a cat. Cats appear to have evolved a sound we are not able to tune out. The relaxed purr you get while stroking a cat does not contain it.

Cheetahs, cougars, servals, ocelots, bobcats and lynx all purr. Lions, tigers, leopards and jaguars cannot — they roar instead. It comes down to a small bone in the throat called the hyoid. A hardened hyoid allows the continuous vibration of purring; a more flexible one allows roaring. No cat gets both, which means a cheetah can purr at you but a lion never will.

Yes, though less often. Cats have been observed purring while eating alone or playing with a toy by themselves. Purring is most common in company, which fits the idea that it is partly a social signal — but it is not performed solely for our benefit.

It helps many people, and we would rather explain why than promise a result. A steady, low, unchanging sound gives your attention something dull to settle on and masks the small noises — a pipe, a car, a creak — that pull you back awake. Purring does that unusually well because it barely varies. Whether it works for you is worth ten minutes of trying rather than taking our word for it.

People use it for both, and the same reasoning applies: quiet consistent sound is easier to work and settle beside than silence or music with words in it. We are not a treatment for anxiety. If anxiety is affecting your daily life, please talk to a doctor — a video of a cat is a nice thing to have on in the background, not a substitute for care.

Yes, at a sensible volume. The World Health Organization suggests keeping personal audio below about 60% of maximum, and treats around 80 dB as safe for extended listening. Our own rule of thumb is simpler: play it quietly enough that you could still hold a conversation over it. If you use headphones overnight, soft ones designed for sleeping are far kinder to your ears and to the side of your head.

Played quietly in a room, purring is just a soft, low sound. Keep the volume low, keep speakers away from a cot, and never use headphones or earbuds on an infant. If your child has any hearing or ear condition, ask your paediatrician first.

Sometimes, and reactions vary a lot. Some cats settle beside a purring session, some ignore it entirely, and a few come looking for the cat they can hear. If your pet seems unsettled or starts searching the room, turn it off — it is meant to be relaxing for everyone in it.

Not without asking, but please do ask. Everything here is recorded by us and belongs to us. Sharing and linking to the videos is very welcome; re-uploading them, selling them or using them inside your own content is not. If you have something in mind, email us at frequencypurr@gmail.com — we are reasonable people.

Subscribe on YouTube, or join the email list on this site. If you join the list you will get a short note when a new session is published and nothing else — no daily emails, no selling your address to anyone, and an unsubscribe link in every message.

A family. Lily is the founder and the face of the channel; she picks the sessions, names them and decides which purrs are good enough to publish. Her step dad handles the recording and the boring technical parts. Alani and Monster are unpaid but very well fed.