Posts in Research
We Asked 318 Vets How They Test Hearing. Most Said: A Loud Clap.

# What 318 Veterinary Clinics Told Us About Hearing Health — And What They Did Not Know They Were Saying

*By Janet Marlow, M.A., Certified Sound Behaviorist | Founder and CEO, Pet Acoustics*

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Between August 2023 and April 2026, 318 veterinary clinics across 48 US states requested the Pet Acoustics+ free hearing screening kit for their practice. Every single one was fulfilled and shipped.

That number — 318 clinics, 48 states, all requesting a tool for something they had never been able to test before — tells one kind of story. But the data behind those requests tells a more important one.

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## The Question We Asked

When clinics placed their request, we asked one straightforward question: what do you currently use to assess your patients' hearing?

The answers were a window into a gap that most of the profession has quietly lived with for years.

**256 of 318 clinics — over 80% — reported no hearing assessment product or protocol in place at all.**

Their answers ranged from candid to quietly revealing:

*"I don't have a product I use to test hearing in pets."* — Dr. William King, Frankfort Animal Clinic, KY

*"We do not currently have any testing options available."* — Hillary Cook, Animal Wellness Center

*"No comparable product in house."* — Erin Sutton, Shiloh Veterinary Hospital

*"We have not had need until now to use one."* — Alexsey Dobberstine, Humane Society of Dallas County

That last response is the one that stays with us. **We have not had need until now.** Not because hearing loss in their patients was rare. As our broader dataset of 10,615 screenings shows, 46.5% of dogs and cats have some degree of hearing impairment. The need was always there. What was missing was the tool — and the awareness that the tool was needed.

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## What Clinics Were Using Instead

The remaining clinics described their current method. The most common responses:

- **A loud clap** — hands clapped sharply near the animal's head, watching for a flinch

- **Dropping a heavy object** — a book, a stainless steel bowl, something that makes impact noise

- **Visual startle test** — snapping fingers outside the visual field

*"I usually just clap my hands loudly to see if a pet hears it, or drop a heavy book."* — Dr. Erin P. Schulz, At Your Door Mobile Veterinary Care

*"Im guessing it works better than clapping."* — Ivy Gantt, Moon Veterinary Clinic

Only **4 clinics** mentioned BAER testing — the gold standard audiological assessment that requires specialist referral, specialized equipment, and in many cases sedation. BAER is excellent for confirming deafness. It is not a screening tool for the wellness visit. It was never designed to be.

The picture that emerges is straightforward: the most technologically sophisticated profession in pet care has been assessing one of the five primary senses with a hand clap.

This is not a criticism of veterinary practice. It is a description of a gap that existed because no accessible, validated alternative existed. Until now, there was nothing to use instead.

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## What the Clinics Said When They Arrived

The enthusiasm in the requests was striking. Clinics were not filling out a routine form. They were responding to something they had been waiting for.

*"We are excited to try this product in our office for patients with suspected hearing loss."* — Lauren Newman, Sheltons Veterinary Hospital, NC

*"We have several clients a year who are interested in evaluating their pets' hearing. I think this would be a great way to evaluate it coupled with the in-clinic exam."* — Dr. Jaimie Wisnowski, Preiser Animal Hospital

*"Can't wait to try it out and see results in just one minute!"* — Dr. Carla Bender, Thousand Island Animal Hospital

*"Very cool. I am a hospice veterinarian and would love to see something like this used more as I constantly have clients mention their dogs' hearing loss."* — Dr. Tessa Brown, At Peace Home Veterinary Care

*"We have plenty of clients always asking if their pets can hear."* — Dr. Amy O'Malley, Warrenton Animal Clinic

*"I just acquired a deaf dog and this would be a great test for him and to show clients."* — Randall Ruble, Madera Animal Hospital

*"Yes, if it works well, it would be something we recommend to our clients."* — Dr. Robert R. Maza, Companion Animal Hospital

The demand was already there. Owners were already asking. Veterinarians already knew this was a gap — they just had no way to close it.

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## 48 States. Every Practice Type.

The 318 clinics in our network represent the breadth of American veterinary practice:

- **General practices** from every region, from urban hospital groups to single-veterinarian rural clinics

- **Mobile and house-call practices** — 8 clinics whose model requires tools that travel

- **Emergency and specialty hospitals** — 9 referral and specialist centers

- **Shelters and humane societies** — 7 organizations, where hearing screening has direct implications for adoption placement and behavioral assessment

- **Hospice and end-of-life practices** — where hearing loss is among the most common and least-discussed quality-of-life factors

The top states by clinic count — Florida (32), Texas (29), Pennsylvania (18), California (17), North Carolina (16), New York (16), Michigan (15) — mirror the national distribution of veterinary practices. This is not a regional phenomenon. It is national.

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## The Number That Matters Most

Of the 318 clinics, only 4 had any formal audiological testing capability. The rest were working with their hands and their instincts.

Meanwhile, our hearing dataset tells us that among the patients walking through those clinic doors:

- **46.5%** have some degree of hearing impairment

- **28.2%** have significant loss across all frequency bands

- **50.2%** have absent high-frequency response — the earliest and most sensitive marker of age-related decline

- The majority of those animals have **no hearing baseline on record**

The math is uncomfortable. A clinic seeing 20 patients a day is likely seeing 9 or 10 animals with undetected hearing loss — animals whose behavioral presentations, stress responses, and treatment plans may be influenced by a sensory factor that no one has measured.

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## What the Screening Changes

The Pet Acoustics+ hearing screening takes under two minutes. It requires no equipment beyond a smartphone. It tests behavioral response across three frequency bands — low (125 Hz to 1 kHz), mid (1 kHz to 4 kHz), and high (4 kHz to 16+ kHz) — and generates a structured clinical PDF the veterinarian can enter into the patient record.

What it creates, for the first time, is a **baseline**.

A baseline changes everything about what happens next. It gives the veterinarian a comparison point for every future visit. It gives the owner language for what they have been observing. It gives the behavioral picture context — when a dog stops responding to commands or a cat begins startling at touch, the veterinarian can ask not only "what has changed behaviorally?" but "what has changed neurologically or sensorially?"

It also changes the conversation around hearing for good. Once a baseline exists, hearing becomes a variable — something tracked over time, something included in the longitudinal health record, something that informs decisions about environment, training, medication, and quality of life.

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## The Profession Is Ready

The 318 clinics in our network did not need to be convinced that hearing health mattered. They requested the tool because they already knew their patients needed it and their clients were asking for it.

What they needed was something practical. Something that fit into a wellness visit. Something that did not require a referral, a specialist, or a sedated patient.

*"Clients will love it."* — Sara Fletcher, Greensboro Mobile Veterinary Housecalls

*"Interested in how this test will benefit our patients."* — Dr. Erin Downard, Country Brook Animal Hospital

*"This will be something very interesting to try."* — Janet Henkel, Tillamook Veterinary Hospital, OR

The interest is there. The need is documented. The gap between what is currently assessed at a wellness visit and what could be assessed — with a free, two-minute smartphone tool — is one that the profession is ready to close.

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## For Veterinary Professionals

The Pet Acoustics+ hearing screening is free to download and free to use. It can be integrated into any wellness visit workflow without additional equipment, staff training, or scheduling time.

To request a free sample kit for your practice or to learn more about integrating hearing screening into your wellness protocol, visit **petacoustics.com** or contact us directly at janetmarlow@petacoustics.com.

Your patients' owners are already asking whether their pets can hear. Now there is an answer you can give them.

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*Janet Marlow, M.A., is a Certified Sound Behaviorist, Founder and CEO of Pet Acoustics Inc., and the developer of the world's first behavioral digital hearing screening for companion animals. Her research has been published in peer-reviewed international journals and is endorsed by the Fear Free veterinary initiative.*

Music Study Shows Significant Reduction in Canine Stress

New study reveals Pet Acoustics music significantly reduces canine stress more effectively than classical music or silence in a kennel environment.

International Animal Health Journal, Volume 11, Issue 2

Pet Acoustics, the pioneering force in animal-specific auditory products, proudly announces a proven discovery in the realm of pet care. A comprehensive biometric study has unequivocally shown that Pet Acoustics music reduces stress levels in dogs more effectively than classical music and no music, revolutionizing how we care for our canine companions in kennels and beyond. 

Unprecedented Findings

  1. Stress Reduction
    Dogs exposed to Pet Acoustics music had less stress behaviors measured by the PetPace™ Smart Collar. The PetPace™ biometric collar worn by 12 dogs showed a higher heart rate variability (HRV), lowered pulse rates and calmer activity levels showcasing the profound impact of the Pet Acoustics tailored auditory experience.The study was collaborated with the Co-Founder of PetPace™, Dr. Asaf Dagan.

  2. Outperforms Classical Music
    While classical music has been praised for its soothing effects, Pet Acoustics music, meticulously crafted for canine ears, outperformed classical compositions in reducing stress indicators, setting a new standard in pet care.

  3. Reality of No Music
    Dogs in the no-music group exhibited heightened anxiety and stress, with higher pulse rates, and more frequent stress-related behaviors, highlighting the necessity of auditory intervention for canine well-being.

Comprehensive Study Methodology

This six week groundbreaking study canines were recruited from Educated Canines Assisting with Disabilities (ECAD, Torrington, CT, US), an Assistance Dog International (ADI) accredited service dog organization. Lu and Dale Picard, Founders of ECAD, reviewed the study for animal welfare and safety considerations and based on the non-invasive biometric monitoring parameters and non-invasive music/ sound interventions agreed to have 12 service dogs in training participate in the study.

Janet Marlow, CEO and Founder of Pet Acoustics, states, “This is a monumental validation of our mission to enhance animal lives through scientifically-backed music. These findings, published and peer reviewed in the International Animal Health Journal highlight the critical importance of tailored auditory solutions for pets, and we are thrilled to lead this transformative movement.”  A ten-minute documentary of the study is posted Pet Acoustics’ Youtube channel.

 

Impactful Implications for Kennel and Home Management

The study’s results suggest that incorporating Pet Acoustics music into kennel environments can revolutionize stress management, creating a more serene atmosphere for animals and staff alike. This breakthrough offers an invaluable tool for kennel operators, veterinary clinics, and pet parents dedicated to optimizing the welfare of dogs under their care.

About Pet Acoustics

Pet Acoustics is at the forefront of improving animal lives through innovative music products such as Pet Tunes Canine and Pet Tunes Pro designed for specific species. Their cutting-edge solutions cater to the unique auditory sensitivities of dogs, cats, horses, birds, and small animals. Trusted by pet parents and professionals worldwide, Pet Acoustics continues to set new benchmarks in animal well-being.

Walking with Llamas

We all have different ways of living life. For me, experiencing the nature of animals is fascinating and I’m always looking for an opportunity to do so. So when I saw that Debbie Labbe of Country Quilt Llama Farm in Cornwall, CT offered walks with Llamas I jumped in to schedule.

Debbie gave us an address by a country road to meet up. We came to the trail and lo and behold across the street coming out of a van were our two Llama walk-mates, Theo and Rio. Seems that Llamas are perfectly comfortable sitting in a carpeted van floor and traveling to their next walking mission. (great idea for a car commercial) In the hour, we walk on a beautiful trail where we learned about these wondrous beings. They weigh about 350 lbs, live up to 20 years, they are gentle and calm. Some fun facts:

  • Llamas make excellent guards for herds of small animals. They are very social and will 'adopt' a group of sheep or goats as their own herd. ...

  • Llamas are smart. ...

  • Llamas are the camel's hippie cousins. ...

  • One of the ways llamas communicate is by humming.

  • They are bright-eyed, sure-footed hiking companions.

Walking the LLamas.jpg

I had read up about Llamas but found very little exacting information on their hearing ability. As cousins of camels, camel hearing is from 20Hz to 14,000 Hz meaning very similar to human hearing range from 20Hz to 20,000Hz. However, during our walk we observed how Llamas behaved when hearing animal movement in the woods and hearing a dog and their person approach on the trail even before we humans saw them. Here’s a video of Theo’s ears movement capturing sounds.

Llamas get sheared once a year and their wool is spun into wool.

Theo on the left is 11 years old was a cool personality. Rio on the right was a young Llama about 9 months old and was a willing follower.

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In 1992, Debbie developed a children’s enrichment program for preschools, daycare centers and libraries called “Hooked On Llamas”. Also an Animal Assisted Therapy (AAT) program sharing her llamas with adults at convalescent homes, rest homes, assisted living facilities and Adult Daycare Centers.

When it was time to go home, I brought some carrots to give to our walk-mates as a treat. Then they hopped into the van. A fascinating morning learning more about our gentle animal world.

Theo in car.jpg

If you want to Walk with Llamas visit: https://www.countryquiltllamafarm.com/

ResearchJanet Marlow
Janet Marlow's Journey for Animals

I started the journey into the study of canine hearing and the responses to sound in 1994. My first research was looking up information in veterinary medical books to learn about the effects of sound on the canine ear. To my surprise, there was no information on behavioral responses to sound but solely on ear structure. My curiosity grew stronger and inspired me towards finding out more about canine hearing. It became clear to me that this was an overlooked area of canine and feline life.

I wrote to world leaders in the study of animal hearing such as H.E. Hefner and R.S. Hefner at the University of Toledo Laboratory of Animal Comparative Hearing asking them for copies of their research. I received these papers which showed hearing ranges of animals from chickens to bats in decibels and frequencies. Over three years, I began formulating a concept. I focused on canine and feline hearing ranges first as these are the most common companion animals. By acknowledging that dog and cat hyper-vigilant behavior is triggered by high and low ranges for survival, I thought surely this is occurring behaviorally in our homes. Are pet behaviors being triggered by sound and overlooked because these agitating sounds are not being heard by humans? What can be provided for pets to help them feel calm?

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The concept soon solidified in my mind. By eliminating these alert levels in our pet's environment, the result should elicit calm. Relating this to my dogs and cats who demonstrated their soothing as I practiced for performances, I saw music as the answer. As a recording artist in my studio, I was adept at manipulating sound modifying decibel and frequency content. This was the beginning of my journey.

In 1997, I invented species-specific music which is music designed for the hearing comfort range of dogs, cats, horses and birds to help balance behaviors. Since then, proven clinical studies, published research, awards and thousands of products sold globally have been a solution for separation anxiety and noise phobias for pet parents, veterinarians and shelters disbursed through my corporation, Pet Acoustics.

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In 2020, I’m continuing animal hearing research in collaboration with veterinary research institutes around the world, most recently in the agricultural field for pigs and cows. Janet Marlow, Founder of Pet Acoustics.

ResearchJanet Marlow