20 Best Alexa Dog Whistle [2024]

Are you looking for the best Alexa Dog Whistle? Based on expert reviews, we ranked them. We've listed our top-ranked picks, including the top-selling Alexa Dog Whistle.

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1 Embark Breed Identification Kit | Most Accurate Dog DNA Test | Test 350+ Dog Breeds | Breed ID Kit... Embark Breed Identification Kit | Most Accurate Dog DNA Test | Test 350+ Dog Breeds | Breed ID...
2 Petcube Cam Pet Monitoring Camera with Built-in Vet Chat for Cats & Dogs, Security Camera with 1080p... Petcube Cam Pet Monitoring Camera with Built-in Vet Chat for Cats & Dogs, Security Camera with...
3 Echo Dot (3rd Gen, 2018 release) - Smart speaker with Alexa - Charcoal Echo Dot (3rd Gen, 2018 release) - Smart speaker with Alexa - Charcoal
4 Wyze Cam v3 with Color Night Vision, Wired 1080p HD Indoor/Outdoor Security Camera, 2-Way Audio,... Wyze Cam v3 with Color Night Vision, Wired 1080p HD Indoor/Outdoor Security Camera, 2-Way Audio,...
5 Tile Pro (2020) 1-pack - High Performance Bluetooth Tracker, Keys Finder and Item Locator for Keys,... Tile Pro (2020) 1-pack - High Performance Bluetooth Tracker, Keys Finder and Item Locator for...
6 Petcube Bites 2 Lite Interactive WiFi Pet Monitoring Camera with Phone App and Treat Dispenser,... Petcube Bites 2 Lite Interactive WiFi Pet Monitoring Camera with Phone App and Treat Dispenser,...
7 STOPWOOFER Ultrasonic Dog Training-Bark Control Device for Small Medium and Large Dogs-Dog Bark... STOPWOOFER Ultrasonic Dog Training-Bark Control Device for Small Medium and Large Dogs-Dog Bark...
8 2 Pack Dog Whistle for Stop Barking, Professional Ultrasonic Dog Whistles Puppy Bark Control... 2 Pack Dog Whistle for Stop Barking, Professional Ultrasonic Dog Whistles Puppy Bark Control...
9 YI Pan-Tilt Security Camera, 360 Degree 2.4G Smart Indoor Pet Dog Cat Cam with Night Vision, 2-Way... YI Pan-Tilt Security Camera, 360 Degree 2.4G Smart Indoor Pet Dog Cat Cam with Night Vision,...
10 Tile Pro (2020) 2-pack - High Performance Bluetooth Tracker, Keys Finder and Item Locator for Keys,... Tile Pro (2020) 2-pack - High Performance Bluetooth Tracker, Keys Finder and Item Locator for...
11 Pet Camera, Vimtag Indoor Camera with 1080P Night Vision, Motion/Sound Detection for Baby Dog... Pet Camera, Vimtag Indoor Camera with 1080P Night Vision, Motion/Sound Detection for Baby Dog...
12 Echo Dot (4th Gen, 2020 release) | Smart speaker with Alexa | Charcoal Echo Dot (4th Gen, 2020 release) | Smart speaker with Alexa | Charcoal
13 Whistles with Lanyard Emergency Whistle Brass Aluminum Loud Alarm for Safety Camping Hiking Hunting... Whistles with Lanyard Emergency Whistle Brass Aluminum Loud Alarm for Safety Camping Hiking...
14 SportDOG Brand Roy Gonia Special Whistle Without Pea - Hunting Dog Training Whistle with... SportDOG Brand Roy Gonia Special Whistle Without Pea - Hunting Dog Training Whistle with...
15 Petcube Play 2 Wi-Fi Pet Camera with Laser Toy & Alexa Built-In, for Cats & Dogs. 1080P HD Video,... Petcube Play 2 Wi-Fi Pet Camera with Laser Toy & Alexa Built-In, for Cats & Dogs. 1080P HD Video,...
16 Noopel 2 Pack Survival Whistle with Lanyard and Keychain Double Tubes Emergency Safety Whistle with... Noopel 2 Pack Survival Whistle with Lanyard and Keychain Double Tubes Emergency Safety Whistle...
17 PetSpy Dog Training Whistle with Wrist Strap for Dog Recall, Bark Control - Complete Pet Training... PetSpy Dog Training Whistle with Wrist Strap for Dog Recall, Bark Control - Complete Pet Training...
18 Audoloku 2 Pack Ultrasonic Dog Whistle Dog Training Silent Ultrasound Whistles to Stop Puppy Barking... Audoloku 2 Pack Ultrasonic Dog Whistle Dog Training Silent Ultrasound Whistles to Stop Puppy...
19 XXINMOH Whistle with Lanyard for Coaches, Referees, Training, Outdoor Camping Accessories,Dog... XXINMOH Whistle with Lanyard for Coaches, Referees, Training, Outdoor Camping Accessories,Dog...
20 HyperWhistle The Original Worlds Loudest Whistle up to 142db Loud, Very Long Range, for Referee,... HyperWhistle The Original Worlds Loudest Whistle up to 142db Loud, Very Long Range, for Referee,...
Bestseller No. 1
Embark Breed Identification Kit | Most Accurate Dog DNA Test | Test 350+ Dog Breeds | Breed ID Kit...
  • BREED ID THAT'S TWICE AS PRECISE: Embark tests over 230,000 genetic markers, twice as many as the next competitor. We also screen for 350+ dog breeds,...
  • HIGHEST RATED & MOST TRUSTED: Embark is the highest rated dog DNA brand on Amazon.com with over 16,000 5-star reviews. Only Embark uses research-grade...
  • DISCOVER YOUR PUP'S RELATIVES: Find and connect with your pup's family through the world’s first canine relative finder. Over 90% of dogs tested by...
  • EXCELLENT SERVICE & FAST RESULTS: Have a question about your results? Just talk to one of our dedicated vets or geneticists — they’re ready with...
  • UPGRADE ANYTIME: Take the next step to smarter care. Upgrade your Embark account at any time to get your dog's genetic health report with hundreds of...
SaleBestseller No. 2
Petcube Cam Pet Monitoring Camera with Built-in Vet Chat for Cats & Dogs, Security Camera with 1080p...
  • 🎥 1080p HD video with 30-feet night vision – With Petcube Cam Wi-Fi pet camera, check on your pet and home security anytime with full HD live...
  • 👩‍⚕️ Built-in Vet Chat – If you capture any suspicious pet behavior, consult a professional vet 24/7 to see if your pet needs a clinic...
  • 🔔 Real-time alerts & smooth 2-way audio – Get notified of any activity at home with instant sound and motion alerts. Speak to your pets and hear...
  • 🎞 Video history and downloads – With our optional subscription service, Petcube Care, you can replay up to 90 days of activity and save your...
  • 🚀 Quick 1-minute set-up – Get your Petcube Cam pet camera up and running in under 60 seconds. Cam is only compatible with the 2.4GHz WiFi network...
SaleBestseller No. 3
Echo Dot (3rd Gen, 2018 release) - Smart speaker with Alexa - Charcoal
  • Meet Echo Dot - Our most compact smart speaker that fits perfectly into small spaces.
  • Improved speaker quality - Better speaker quality than Echo Dot Gen 2 for richer and louder sound. Pair with a second Echo Dot for stereo sound.
  • Voice control your music - Stream songs from Amazon Music, Apple Music, Spotify, Sirius XM, and others.
  • Ready to help - Ask Alexa to play music, answer questions, read the news, check the weather, set alarms, control compatible smart home devices, and...
  • Voice control your smart home - Turn on lights, adjust thermostats, lock doors, and more with compatible connected devices. Create routines to start...
Bestseller No. 4
Wyze Cam v3 with Color Night Vision, Wired 1080p HD Indoor/Outdoor Security Camera, 2-Way Audio,...
  • Color night vision: An all-new Starlight Sensor records night time video in full, vivid color. The Starlight Sensor can see full color in environments...
  • Indoor/Outdoor: Wyze Cam v3 is a wired video camera with an IP65 rating so you can confidently install it outside in the rain or inside in the kids’...
  • Motion & Sound detection: Wyze Cam records video when motion or sound is detected and sends an alert straight to your phone. Motion Detection Zones...
  • 24/7 Continuous Recording: Continuous video recording with a 32GB MicroSD card (sold separately). Just insert the MicroSD into the base of the Wyze...
  • IFTTT certified connect all of your different apps and devices. When you sign up for a free account, you can enable your apps and devices to work...
SaleBestseller No. 5
Tile Pro (2020) 1-pack - High Performance Bluetooth Tracker, Keys Finder and Item Locator for Keys,...
  • FIND KEYS, BAGS & MORE -- Directly attach the powerful Pro to keys, backpacks, purses or anything else you need to keep track of regularly and use our...
  • FIND NEARBY -- Use the Tile app to ring your Pro when it’s within 400 ft. or ask your Smart Home device to find it for you. Tile works with Amazon...
  • FIND FAR AWAY -- When outside of Bluetooth range, use the Tile app to view your Tile’s most recent location or enlist the secure and anonymous help...
  • FIND YOUR PHONE -- Use your Tile to find your phone, even when it’s on silent.
  • UPGRADE YOUR FINDING EXPERIENCE -- Subscribe to Premium or Premium Protect for proactive finding features and enhanced services including Item...
SaleBestseller No. 6
Petcube Bites 2 Lite Interactive WiFi Pet Monitoring Camera with Phone App and Treat Dispenser,...
  • 🎥Your All-In-One Pet Monitor: Check on your pet and home anytime anywhere with full HD 1080p live streaming video, 160° wide-angle view, clear...
  • 🦴 Treat Your Pet Remotely: Bites 2 Lite has a treat dispenser with 1.5 lbs container that allows you to toss dry, crunchy dog and cat treats short,...
  • ⏳ Easy 1-minute Set-up: Get your Petcube Bites 2 Lite ready to use in under 60 seconds. Note, Bites 2 Lite is only compatible with the 2.4GHz WiFi...
  • 👩🏼‍⚕️ Take Your Pet to Vet Online: Petcube cameras have a built-in 24/7 online Vet Chat that lets you consult a professional veterinarian...
  • 💬 24/7/365 Customer Support: We warrant the Petcube-branded product against defects in materials and workmanship under normal use for a period 1...
SaleBestseller No. 7
STOPWOOFER Ultrasonic Dog Training-Bark Control Device for Small Medium and Large Dogs-Dog Bark...
  • Bark control and dog training: Ultrasonic Dog Bark Deterrent is a great device for Dog Training and Dog Bark Control. The set ultrasonic frequency (25...
  • Safe and effective:Bark deterrent device is an innovative solution for Dog barking and correcting unwanted behavior. Ultrasonic dog training device is...
  • Convenience and ease of use: The small size of the Dog bark deterrent fits perfectly in the hand. You can carry it in your pocket. The Sonic dog bark...
  • Better understanding between you and your dog: train your dog to behave properly with friendly devices such as Dog bark deterrent devices. Be patient...
SaleBestseller No. 8
2 Pack Dog Whistle for Stop Barking, Professional Ultrasonic Dog Whistles Puppy Bark Control...
  • 【 HOW TO TRAIN YOUR DOG? 】: Each time you use different flute methods to specify the commands such as “Do not move”, “Sit down” and...
  • 【 PROFESSIONAL DOG WHISTLE 】: You can adjust the pitch to get the right frequencies, loosen the sonic adjustment screw while blowing the air in...
  • 【 SAFE DOG WHISTLE】: Our dog whistle is made of safe high-quality stainless steel, training your dog without any health concerns, it doesn't hurt...
  • 【 ANTI-LOSS DESIGN 】: Our dog training whistles come with a high-quality lanyard and special lock nut & cover, it allows you to take this dog...
  • 【 ENJOY DOG TRAINING 】: Your pet can hear the dog whistle up to 25 meters away even if they can't see you! complete training freedom with poodles,...
Bestseller No. 9
YI Pan-Tilt Security Camera, 360 Degree 2.4G Smart Indoor Pet Dog Cat Cam with Night Vision, 2-Way...
  • Flexible monitoring with 360° tracking: On top of the excellent optic and 1080p image quality, the YI Dome Guard featuring direction control, motion...
  • Excellent Night Guard: Enhanced night vision with IR lights featuring 140° wide-angle lens, high resolution 1080p HD, and enhanced night vision...
  • 2-WAY AUDIO: Equipped with a built-in microphone & speaker that allows you to speak to your family members or pets anytime while you are away. It...
  • Intelligent Human, Motion, & Sound Detection: With the power of edge computing, receive smarter and faster human, motion, or sound detection...
  • Time Lapse Feature: Compress up to 6 hours into a fun clip between 5-30 seconds. Now you can have fun with your video recording to capture fun and...
Bestseller No. 10
Tile Pro (2020) 2-pack - High Performance Bluetooth Tracker, Keys Finder and Item Locator for Keys,...
  • FIND KEYS, BAGS & MORE -- Directly attach the powerful Pro to keys, backpacks, purses or anything else you need to keep track of regularly and use our...
  • FIND NEARBY -- Use the Tile app to ring your Pro when it’s within 400 ft. or ask your Smart Home device to find it for you. Tile works with Amazon...
  • FIND FAR AWAY -- When outside of Bluetooth range, use the Tile app to view your Tile’s most recent location or enlist the secure and anonymous help...
  • FIND YOUR PHONE -- Use your Tile to find your phone, even when it’s on silent.
  • UPGRADE YOUR FINDING EXPERIENCE -- Subscribe to Premium or Premium Protect for proactive finding features and enhanced services including Item...
SaleBestseller No. 11
Pet Camera, Vimtag Indoor Camera with 1080P Night Vision, Motion/Sound Detection for Baby Dog...
  • 【 Full Coverage & Capture Clear Details】When you want to see what the dog is doing while you are at work, you can see every corner of your home to...
  • 【Instants Alerts & Following Object Moving】Vimtag home camera supports motion, sound and human detection. When it detects a motion or sound, this...
  • 【Speak to Your Baby/Pet & Clear Night View】Built-in microphone & speaker, speak to your pets/babies and hear them back, telling them you love them...
  • 【Continuous Record & Cloud Service 】This home camera supoorts micro SD card storage for continuous video record after manually setting up, and...
  • 【Easy Install & Works with Alexa】Easy Install with Vimtag App, just scan the QR code, choose 2.4Ghz WiFi network to connect. Works with alexa, you...
Bestseller No. 12
Echo Dot (4th Gen, 2020 release) | Smart speaker with Alexa | Charcoal
  • Meet the Echo Dot - Our most popular smart speaker with Alexa. The sleek, compact design delivers crisp vocals and balanced bass for full sound.
  • Voice control your entertainment - Stream songs from Amazon Music, Apple Music, Spotify, SiriusXM, and others. Play music, audiobooks, and podcasts...
  • Ready to help - Ask Alexa to tell a joke, play music, answer questions, play the news, check the weather, set alarms, and more.
  • Control your smart home - Use your voice to turn on lights, adjust thermostats, and lock doors with compatible devices.
  • Start Routines with your motion - Turn on compatible lights, play your Flash Briefing, or turn on the coffee maker when you walk into the room.
Bestseller No. 13
Whistles with Lanyard Emergency Whistle Brass Aluminum Loud Alarm for Safety Camping Hiking Hunting...
  • Super Loud Whistles: double tubes aluminum emergency whistle - high-pitched noise maker with its dual sound chambers; single chamber brass whistle...
  • Durable Emergency Whistles: all the whole whistles are made of brass or alunimun, not like some other metal whistles with plastic blocker inside;...
  • One-piece Design: novelty whistle without moving parts, no sound obstructing, and nothing to jam, break or freeze while the traditional ones do. Shock...
  • Whistle for Most: compact, lightweight, durable, handy and loud novelty whistle for gym coach, school PE teacher, sports outdoor camping hiking...
Bestseller No. 14
SportDOG Brand Roy Gonia Special Whistle Without Pea - Hunting Dog Training Whistle with...
  • Easy-to-blow design and convenient key ring connector
  • High-pitched sound, excellent for puppies and close-work
  • Will not freeze, making it ideal for colder weather
  • No trill, pealess design
SaleBestseller No. 15
Petcube Play 2 Wi-Fi Pet Camera with Laser Toy & Alexa Built-In, for Cats & Dogs. 1080P HD Video,...
  • 24/7 Ultimate pet monitoring – With Petcube Play 2 Wi-Fi pet cam, check on your pet anytime form your phone with 1080p HD video, 160°...
  • Quick 2-minute setup – Petcube Play 2 is the only pet camera to support 2. 4Ghz and 5Ghz Wi-Fi connections. iOS 11 and higher, Android 7. 1. 2 and...
  • Chat with your pet – With superior 2-way audio, you can hear and speak to your pet when away. Enjoy rich “lifelike” sound quality, now with a...
  • Play from your phone – Play with your furkid with a built-in pet safe laser toy, controlled from your phone, or set to autoplay mode to entertain...
  • Built-in Alexa assistant – Play music, answer questions, hear the news, control smart home devices, order your pet’s favourite treats, and more...
SaleBestseller No. 16
Noopel 2 Pack Survival Whistle with Lanyard and Keychain Double Tubes Emergency Safety Whistle with...
  • Super loud survival whistle: double tubes emergency whistle can provide up to about 120 decibels, enough to be heard at long distance.
  • Premium Quality: Aluminum Alloy Material, strong and durable.
  • Lightweight: only 12g, easy to carry.
  • Water-resistance camping whistle: Be used in all-environment all-weather, rainy day, humid weather with excellent airflow design.
  • Versatility: Loud safety whistle for camping, hiking, hunting, fishing, boating any kind of outdoor activities.
Bestseller No. 17
PetSpy Dog Training Whistle with Wrist Strap for Dog Recall, Bark Control - Complete Pet Training...
  • TRAIN YOUR PET IN A SHORT TIME – clicker and whistle are great communication way with your dog, perfect for behavior and obedience dog training
  • DOG WHISTLE FOR TRAINING - It doesn’t matter what breed your dog belongs to, it provides a harmless option to train your dog and build a greater...
  • AUDIBLE TO HUMAN EAR – A peace of mind for pet parents ensuring that your dog can hear your commands just as well as you do - it won’t ever hurt...
  • FUN AND EFFICIENT TIME WITH YOUR DOG - Backed up by dog trainers and science, our clickers and whistles provides positive reinforcement for easy and...
  • CONVENIENT TO CARRY AROUND - It is small and lightweight, so you can put it on a key chain or in a pocket
Bestseller No. 18
Audoloku 2 Pack Ultrasonic Dog Whistle Dog Training Silent Ultrasound Whistles to Stop Puppy Barking...
  • 【Multifunctional Dog Training Whistle】 The dog whistle is designed to generate various frequencies, adjustable tones, and the frequency of the dog...
  • 【Anti-Loss Design】 Our dog training whistles come with a high-quality lanyard and special lock nut & cover, it allows you to take this dog whistle...
  • 【Wide Control Range】 Your pet can hear the dog whistle up to 25 meters away even if they can't see you! Train your dog with different commands and...
  • 【Safe Dog Whistle】 Our dog whistle is made of safe high-quality stainless steel, training your dog without any health concerns, it doesn't hurt...
  • 【Note】 This silent dog whistle emits an ultrasound, which you may NOT be able to hear, but dogs can hear it.Please note the dog whistle wouldn't...
Bestseller No. 19
XXINMOH Whistle with Lanyard for Coaches, Referees, Training, Outdoor Camping Accessories,Dog...
  • Whistle Stable and durable--our whistle is made of thick high-strength Abs plastic, odorless, non-toxic, and non-carcinogenic.
  • Whistle is loud-clear and loud. No use of pea whistle core, no mold, longer life。
  • Lightweight-two whistles with lanyard. 19in long with lanyard, weight 9.9g (0.35oz), very convenient to carry and use
  • Coach refereeWide range of uses-these whistles is very suitable for referees, coaches, teachers, Gyms, Schools, emergencies, hiking, rafting, etc.
  • Service-We promise that as long as there are any non-artificial defects, we will provide you with free replacement for life. All our whistles will be...
SaleBestseller No. 20
HyperWhistle The Original Worlds Loudest Whistle up to 142db Loud, Very Long Range, for Referee,...
  • SUPER LOUD- Up to 142dB for 2+ mile 8x range of a common sports whistle
  • Includes re-usable hearing protectors and easy clip neck lanyard
  • Used for Boating, Sporting Events, Life Safety, Camping, Hiking, Police
  • Durable whistle

Having trouble finding a great Alexa Dog Whistle?

This problem is well understood by us because we have gone through the entire Alexa Dog Whistle research process ourselves, which is why we have put together a comprehensive list of the best Alexa Dog Whistles available in the market today.

After hours of searching and using all the models on the market, we have found the best Alexa Dog Whistle for 2023. See our ranking below!

How Do You Buy The Best Alexa Dog Whistle?

Do you get stressed out thinking about shopping for a great Alexa Dog Whistle? Do doubts keep creeping into your mind?

We understand, because we’ve already gone through the whole process of researching Alexa Dog Whistle, which is why we have assembled a comprehensive list of the greatest Alexa Dog Whistle available in the current market. We’ve also come up with a list of questions that you probably have yourself.

John Harvards has done the best we can with our thoughts and recommendations, but it’s still crucial that you do thorough research on your own for Alexa Dog Whistle that you consider buying. Your questions might include the following:

  • Is it worth buying an Alexa Dog Whistle?
  • What benefits are there with buying an Alexa Dog Whistle?
  • What factors deserve consideration when shopping for an effective Alexa Dog Whistle?
  • Why is it crucial to invest in any Alexa Dog Whistle, much less the best one?
  • Which Alexa Dog Whistle are good in the current market?
  • Where can you find information like this about Alexa Dog Whistle?

We’re convinced that you likely have far more questions than just these regarding Alexa Dog Whistle, and the only real way to satisfy your need for knowledge is to get information from as many reputable online sources as you possibly can.

Potential sources can include buying guides for Alexa Dog Whistle, rating websites, word-of-mouth testimonials, online forums, and product reviews. Thorough and mindful research is crucial to making sure you get your hands on the best-possible Alexa Dog Whistle. Make sure that you are only using trustworthy and credible websites and sources.

John Harvards provides an Alexa Dog Whistle buying guide, and the information is totally objective and authentic. We employ both AI and big data in proofreading the collected information.

How did we create this buying guide? We did it using a custom-created selection of algorithms that lets us manifest a top-10 list of the best available Alexa Dog Whistle currently available on the market.

This technology we use to assemble our list depends on a variety of factors, including but not limited to the following:

  1. Brand Value: Every brand of Alexa Dog Whistle has a value all its own. Most brands offer some sort of unique selling proposition that’s supposed to bring something different to the table than their competitors.
  2. Features: What bells and whistles matter for an Alexa Dog Whistle?
  3. Specifications: How powerful they are can be measured.
  4. Product Value: This simply is how much bang for the buck you get from your Alexa Dog Whistle.
  5. Customer Ratings: Number ratings grade Alexa Dog Whistle objectively.
  6. Customer Reviews: Closely related to ratings, these paragraphs give you first-hand and detailed information from real-world users about their Alexa Dog Whistle.
  7. Product Quality: You don’t always get what you pay for with an Alexa Dog Whistle, sometimes less, and sometimes more.
  8. Product Reliability: How sturdy and durable an Alexa Dog Whistle is should be an indication of how long it will work out for you.

John Harvards always remembers that maintaining Alexa Dog Whistle information to stay current is a top priority, which is why we are constantly updating our websites. Learn more about us using online sources.

If you think that anything we present here regarding Alexa Dog Whistle is irrelevant, incorrect, misleading, or erroneous, then please let us know promptly!

Related Post:

FAQ:

Q: What is the best dog whistle for training?

A: 1. Forepets Professional Dog Whistle 2. Acme Silent Dog Whistle 3. Michael Josh Emergency Survival Dog Whistle 4. SportDOG Brand Roy Gonia Special Whistle 5. Acme Dog Whistle 6. Mighty Paw Dog Training Whistle 7. Acme Shepherd Mouth Whistle 8. Erligpowht Ultrasonic Sound Training Tool 9. SportDOG Brand Dog Whistle

Q: What is dogdog challenge on Alexa?

A: Dog Challenge is an unusual but fun Alexa skill that helps you to hone your dog knowledge by asking you to guess a dog breed based on a description and that dog’s bark. The game aims to have you guess five dog breeds correctly in a row and if you do, you go down in the Daily Dog Expert Hall of Fame.

Q: Can a “silent” dog whistle work through walls?

A: A “silent” whistle is barely audible for humans but can still be heard by dogs and so there are lots of people that choose to buy these to stop incessant dog barking. The question therefore is: can a silent dog whistle work through walls?

Q: Can you use a whistle to train a deaf dog?

A: A silent whistle can be useful for training deaf dogs or dogs with poor hearing as they can often hear sounds at this frequency. If you are using a whistle to train a dog to stop excessive barking in the yard then a silent whistle is a good option as no one else will hear it!