Cat's Hearing and Ears

By Sophie Kininmonth · 29 Oct 2025 (updated 21 Jul 2026) ·6 min read

A cat's hearing is one of the sharpest instruments in the animal world, tuned to catch the thin, high-pitched sounds that small prey make. Those mobile, swivelling ears can pick up a faint squeak across a room and pin down exactly where it came from. That same sensitivity is why ear trouble matters: a minor irritation can feel big to the cat, and an infection left alone can travel deeper and get harder to treat. Most healthy cats never have ongoing ear problems, but it helps to know how the ear works and what the warning signs look like. Below is a plain look at the anatomy, what cats can actually hear, how to read their ears, and when cleaning helps versus when it makes things worse.

Anatomy of a cat's ear

A cat's ear works in three parts: the outer ear collects sound, the middle ear passes it along, and the inner ear turns vibration into nerve signals while also supporting balance.¹

Outer ear: the visible flap, called the pinna, acts like a funnel that guides sound into the ear canal. Cats have unusually fine control here, with about 32 muscles per ear, so each ear can swivel independently and rotate up to around 180 degrees to track a sound.^{3, 4}

Middle ear: vibrations reach the eardrum and then pass through tiny bones, the ossicles, which help transmit and amplify sound into the inner ear.¹

Inner ear: the cochlea holds sensory cells that translate vibration into nerve signals the brain reads as sound. Alongside it, the vestibular structures handle balance and orientation, which is why deeper ear disease can show up as wobbliness or a persistent head tilt.²

How cats hear, and why it is so sharp

Domestic cats hear across a very wide band. Behavioural testing places their hearing range, at moderate loudness, at roughly 48 Hz to 85 kHz, which reaches far beyond the upper limit of human hearing.³

Humans typically hear up to around 20 kHz. Cats detect much higher frequencies, well into the ultrasonic range, while keeping good low-frequency hearing too.³ That high-frequency reach is not a novelty. It matches the small, high-pitched noises made by rodents and other prey, and it explains why some household sounds, like electronics, certain alarms, or a distant squeak you barely notice, can grab a cat's attention instantly. In practice a cat can pick up faint, high-pitched sounds at a distance you would miss, and use small differences in timing and intensity between the two ears to work out where a sound is coming from, especially when the pinnae are swivelling to scan the room.^{3, 4}

Reading a cat's ears

Ear position is best read as part of a whole-body snapshot, taking in the head, whiskers, eyes, posture and tail, rather than as a stand-alone mood meter. Even so, the ears give useful clues about attention and arousal.

Ears forward or neutral: often calm interest, like watching a bird through the window or listening to you open a cupboard.
Ears pivoting like radar dishes: active listening and tracking a moving sound. Independent ear movement is normal and reflects their specialised ear muscles.⁴
Ears flattened or pinned back: can go with fear, defensive behaviour, pain or overstimulation. If it comes with head shaking, scratching, odour or discharge, think ear problem before attitude.^{5, 6}

Common ear problems in cats

Most healthy cats do not have ongoing ear trouble, but when problems do turn up they tend to follow a few familiar patterns.

Ear mites (Otodectes cynotis)

Ear mites are a frequent diagnosis when a cat develops itchy ears. Typical signs include persistent scratching, frequent head shaking, inflamed outer ears, and a dark, waxy, foul-smelling build-up in the ear canal.⁶

Otitis externa (inflammation or infection of the ear canal)

Otitis externa can cause head shaking, scratching, redness, swelling, odour, pain and discharge. Causes vary and can include parasites, foreign material and allergies, with bacteria or yeast sometimes complicating the picture.⁵

Middle and inner ear disease

If infection or inflammation reaches the middle or inner ear, the signs can include a head tilt, loss of balance, abnormal eye movements known as nystagmus, and hearing loss. This is more serious than an outer ear problem and can have lasting effects if it is not treated promptly.²

Cleaning your cat's ears safely

Routine ear cleaning is not necessary for many cats. Over-cleaning can irritate the canal and strip out protective wax. A vet may recommend cleaning as part of treatment, or for cats prone to recurrent build-up.⁵

Before you clean, do a quick check. Skip the cleaning and book a vet visit if you notice any of the following:

redness or swelling
strong odour
discharge, especially dark, coffee-ground debris
obvious pain when the ear is touched
head tilt, wobbliness or balance changes^{2, 5, 6}

If the ears look healthy, a gentle at-home clean of the outer ear only goes like this:

Use a vet-recommended ear cleaner made for cats.
Wipe the visible folds of the pinna with cotton wool or gauze, only what you can see.
If you have been told to use drops, place the nozzle at the ear opening rather than deep inside, apply the recommended amount, then gently massage the base of the ear to loosen debris.
Let your cat shake, then wipe away the loosened material from the outer ear.

Never use cotton buds inside the ear canal. They can push debris deeper and risk injury, especially if the ear is already sore.⁵

Protecting your cat's ears and hearing

Notice patterns. A little wax is normal. Repeated head shaking, scratching, odour or discharge is not.⁵
Treat the cause, not just the mess. Ear mites and infections need targeted treatment, and ongoing otitis often returns if underlying triggers like allergy are not addressed.^{5, 7}
Take balance signs seriously. Staggering, head tilt or abnormal eye movements point to deeper ear involvement and should be assessed promptly.²
Be sensible with noise. Sudden, very loud sounds are stressful for cats, and repeated intense noise can damage hearing across species. Give your cat a quiet retreat during fireworks, renovations or parties.

A few things worth knowing

Cats can rotate each ear up to about 180 degrees using roughly 32 muscles per ear, one reason they lock on to tiny sounds so quickly.⁴
In controlled testing, cats can hear up to around 85 kHz at moderate loudness, well above human hearing.³

The Bottom Line

A cat's ear is built for precision: mobile pinnae to gather and aim sound, a sensitive inner ear to translate it, and balance organs that keep the body steady. When that system is irritated by mites, infection or inflammation, the signs are usually clear enough, from scratching and head shaking to odour, discharge or changes in balance. A light touch and good timing matter. Clean only when it is truly needed, and let a vet lead whenever pain, discharge or a head tilt enters the picture.^{2, 5, 6}

References

Sophie Kininmonth

Dog lover and writer at My Pets Australia, sharing practical breed guides and care advice for Australian pet owners.