Dog Whistle FAQ

An online dog whistle plays a steady high-frequency tone through your phone, tablet, or computer speaker, with no app to install.

It can work, but with a caveat: most phone speakers roll off above about 17 to 20 kHz, so the highest tones may come out quiet or not at all. The good news is that many dogs respond well to tones in the 15 to 22 kHz range that ordinary speakers reproduce just fine.

Think of it as a training aid you pair with rewards, not a remote control. Results vary between dogs, and that is normal. See how to use the online dog whistle for a step-by-step walkthrough.

Because the high-frequency whistle may be silent to you, it is hard to tell whether your speaker is working or how loud it is set.

The 1 kHz test tone sits well within the range every speaker reproduces, so if you can hear it clearly, your hardware is fine.

Use it to set a sensible volume first, then switch to the whistle. That way you are not blindly turning up a tone you cannot hear, which is the most common cause of an accidentally too-loud signal.

That is usually expected, not a fault. Human hearing tops out near 20 kHz and declines with age, so a tone above that range is silent to most people while still audible to your dog, who hears up to around 45 kHz.

To confirm the whistle is actually playing, use the 1 kHz test tone, which every speaker reproduces clearly.

If you want reassurance the high tone is working, drop to 15 to 18 kHz, where many adults can still hear it faintly. If your dog ignores a very high tone, the speaker is the likely culprit, not your dog.

Humans hear up to roughly 20 kHz. Dogs hear much higher, to around 45 kHz, which is why a tone that is faint or silent to you can be clear to your dog.

There is no single correct frequency. A practical starting range is 15 to 25 kHz: high enough to grab a dog's attention, low enough that most speakers can actually produce it.

Pick one frequency, watch for a clear reaction such as ears perking or a head turn, and stay consistent during training. Consistency matters more than the exact number. There is more detail in our notes on what frequencies dogs can hear.

Cats hear even higher than dogs, to around 64 kHz, so they can certainly perceive these tones.

You can pair a tone with treats to get a cat's attention or for simple training, but cats are generally less motivated by recall-style cues than dogs are.

Keep the volume low, never use the tone to startle or punish, and stop if your cat shows stress. Results vary a lot from cat to cat. See our page on using high tones with cats for more.

Probably not reliably. Some rodents do hear ultrasonic frequencies, but the evidence that high tones repel them is weak, and animals tend to get used to a sound that never changes.

A phone speaker also struggles to produce strong output at the highest frequencies, which limits any effect even further.

We make no pest-control promises. Treat this as a dog and cat training aid rather than a repellent.

Used sensibly, a dog whistle is safe. The key is to keep the volume moderate and not hold the speaker close to your dog.

A loud, sudden tone can startle or annoy a dog, and a startled dog learns to avoid the sound rather than respond to it. Start quiet and watch for discomfort: flinching, flattened ears, or backing away means it is too loud or too close.

This is general guidance, not veterinary advice. If your dog has known ear sensitivity or pain, check with your vet before using high-frequency tones.

It can help interrupt barking, but it is not a stop button. A short tone briefly redirects your dog's attention, which gives you a window to reward quiet and offer something else to do.

The lasting change comes from that follow-up, not from the sound itself. Time a short tone as the barking starts, reward the pause, then redirect to a known cue or activity.

Keep the volume moderate and never blast the tone to frighten your dog quiet. Barking from anxiety, boredom, or alarm needs that underlying cause addressed. See our guide on managing barking with a dog whistle.

The tone means nothing to your dog until you give it meaning by pairing it with rewards.

The basic loop:

- Play the tone for a second or two at moderate volume
- Reward immediately, with a treat, praise, or play, the instant your dog looks at or moves toward you
- Keep sessions short: a few minutes, several times a day
- End while your dog is still interested

Over many repetitions, the whistle becomes a reliable predictor of good things, and your dog starts responding to the sound itself. Never use it to punish or startle. Our dog whistle training guide goes deeper.

Often, yes. Pulse mode breaks the tone into short repeated bursts instead of one continuous sound.

A pulsing signal tends to stand out more than a steady tone, which can make it easier for a dog to notice at a distance or with background noise. It also feels less harsh than a long unbroken tone.

Try both steady and pulse, and keep whichever gets a clearer response from your dog. A consistent pulse pattern can even become your dog's personal cue.