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How We Hear - Imagine that you are standing in the center of a field out in nature. The sounds common to this experience have an aural perspective, meaning that we hear in a 360-degree circle- the height and depth of all the sounds. For instance, one can hear the rustling of leaves in the trees, a breeze rushing past our ears, birds chirping nearby and in the distance, airplanes overhead, or cars on a nearby road; we can also hear the contrasting quiet of stillness. We can identify these sounds as they occur, “I understand that is a bird, that is the wind in the trees, that is a car approaching, and that is a plane.” Our reactions to these sounds are appropriate to how we identify the sound source in the aural perspective of our environment.

How They Hear  - Dogs, cats and horses hear frequency ranges that are both much higher and much lower than what humans are capable of hearing. In addition to their acute hearing, the important difference between their hearing capacity and ours is that an animal does not have the same spatial localization as a human, even though their hearing is more acute. In other words, they react to the sound source without analyzing what it is but react to frequency and volume by a flight or fight response.As our pets live in non-nature environments for the most part, these instinctive reactions to extreme sounds can often manifest themselves as behavioral responses such as stress, anxiety or aggression.Animals listen to sounds and music quite differently than humans. Your pet does not have the same audio/spatial localization ability that you have. If there are jarring sounds or shots at loud unexpected volumes, a dog, cat or horse will hear the sound at a greater intensity than humans and instinctively go into fight or flight mode. Amazingly, dogs can react to a sound at .06 of a second.

 Understanding the Benefit of Music for AnimalsMusic is made up of frequencies, volume and vibrationsThe good instinct of many dog, cat and horse owners is to leave a radio or TV on for their pets in the home or barn. Choices of classical music stations, talk radio or country music are used. There are also choices of CD music for pets on the market. This new awareness of music for pets depicts the need for animals to have the company of sound for behavioral calm and atmospheric soothing.Species-specific musicMusic is made up of the same qualities of sounds as in nature, frequencies, volume, and vibrations. During many years of casual observations, I had noted relaxed responses from the animals in my care. Each one consistently gravitated to my side while I was playing live music. The tipping point for me was when my severely injured cat, Osborn, was in the veterinarian hospital. When I visited him, I was struck by the lack of music in the hospital environment. Music was part of his daily life. When he passed, I passionately committed my work to understanding why animals instinctively benefit from music, as humans do, and researching what qualities would guarantee positive results for each species.

We are learning more and more that music has a profound instinctual response from animals for physical and behavioral benefits.The beginning to bridging music and animals was the ability to duplicate music on records for radio broadcast. Being able to bring the music to the animal was and still is a new field. It was observed and then documented that dairy cows produced more milk when listening to relaxing music. Researchers believe that farmers could get an extra pint from their charges by playing classical music. Psychologists Dr. Adrian North and Liam MacKenzie at the University of Leicester, UK played music of different tempos to herds of Friesian cattle. Beethoven's Pastoral Symphony resulted in greater milk production. When loud and rowdy music was played, there was no increase in milk yield. "Calming music can improve milk yield, probably because it reduces stress," said North and MacKenzie."Over the last decade, our knowledge of the auditory abilities of animals in general has been the object of study because it was necessary to determine the hearing abilities of large mammals in order to answer certain questions concerning the evolution of human hearing." H. E. Heffner, Farm Animals and the Environment. (pp.159-184). Wallingford UK: CAB International.From 2003, I have been observing and testing the results of music for dogs, cats and horses. I began by writing to Universities around the world to receive papers on the frequency and decibel hearing ranges of animals. I based the design of my music according to the data research of H. Heffner and R.S. Heffner PH.D. ~ Dept of Psychology at the University of Toledo in Ohio (USA) I have the utmost respect and appreciation for Dr. H. Heffner and Dr. R.S. Heffner’s scientific work on this subject. Hearing of animals and sound localization is relatively a new field and their research is extensive and renowned. Once I had the data of the Hz range of dogs and cats, I purposefully composed the music within a high register, a range that dogs and cats hear the most comfortably. 

Don't you instinctively raise the inflection of your voice when speaking to a dog or a cat? I also added into the music design, the observation that dogs and cats prefer long sustained tones and non-jarring volumes to maintain their state of rest. The premise became logical to me that by eliminating the high frequency content of the music that dogs and cats could be relaxed by releasing their alert reactions to high frequencies in their listening environment. The results were repeatable and the relaxation occurred within five minutes of listening. My next interest moved forward to horses. While visiting stables, riding, working with veterinarians and speaking with horse owners and breeders, I observed special music was needed, tailored for the sensitive physiognomy and environment of horses. I discovered that human and equine hearing ranges are the most closely related than any other mammals. Considering the closeness of people with their horses in speech this enhanced the understanding of this bond through the musical design. I purposefully composed the music in an alto range where equines seem to find the most comfortable to hear. In my observations of horse response to music, I learned that they prefer shorter melodic phrases with rhythmic patterns. This was logical as horses movements are in beats of two's and three's.

The recording process-  As a recording artist for humans for many years, I am well versed in the recording and mastering process. With this skill and the direction of my own species-specific compositions, I am able to go into the final stage of the music to contour the frequency and decibel design of the music for the intended animal, thanks to digital technology.I have received hundreds of positive reviews worldwide and many included that the music had relaxed the pet owner alongside their pet. Inspired by these comments, I continued the species-specific concept to facilitate the human-animal bond with music. Opening up the aperture of sound slightly for human hearing comfort and maintaining the comPress Roomed and sonic design, people enjoy the music as well. Ultimately, this music calms the frequency content of the air of the living environment and elicits a state of relaxation. I believe that we are in an era where we, as a society are spending more time eliminating stimulation from our lives, instinctively seeking balance and well-being.
Text by Janet Marlow all rights reserved  2014

Music Calms Horses-Emotional State
Stachurska, A., Janczarek, I., Wilk, I., and Kedzierski, W., 2015. Does music influence emotional state in race horses? 

Journal of Equine Veterinary Science, 35(5), 650-656.
Research- to determine the effect of music played in the barn, on the emotional state of race horses. Many horse owners have found that music has an apparent calming effect on fear, aggression, and overall stress. Race horses, in particular, have  demands  of increased  cardiac activity and speed that may be improved through music exposure.  

Forty 3-year-old Arabian horses were placed in a barn where they listened to specifically composed music[i] for five hours each day. Their emotional state was assessed by measuring heart rates at rest, saddling, and warm-up walking. Racing performance and number of wins were also recorded. At the end of each month, for three months, data were compared to a control group of horses subjected to the same activity, without having listened to music.    
Results: The music positively impacted the emotional state and performance of treated horses, compared to the control group. What was so remarkable was that the effect was noticeable throughout every activity, even during the heightened excitement of being ridden at a gallop. Even more noteworthy was the positive influence the music had after the second and third months, improving with each subsequent month, exhibited by the number of races won. Beyond three months, however, the impact leveled off, presumably because the horses became accustomed to the music.
Implications for your horses:

Horses are individuals and respond to stress in a variety of ways. This study offers one approach toward helping your horse calm down and better respond to performance demands. But all horses, not just athletes, can benefit from a relaxed, stress-free environment.
Increased amount of stall confinement, often seen with the onset of winter weather, can agitate many horses. Soft music, Pet Acoustics, Janet Marlow, composer Equine music, such as was used in this study (see endnote for more information), can be a useful tool in helping your horse cope with being indoors, as well as veterinary and farrier visits, travel, and other stressors.  Edited by Juliet M. Getty, Ph.D.

Canine Clinical Studies

Fidelco Guide Dog Research Results- Over a period of nine months we tested the Pet Tunes Canine music and the Ultra Calmer Canine Collar with the German Shepherds in training. We specifically monitored the blood pressure, sitting position and pulse rate of ten dogs. Nine out of ten dogs responded within five minutes of listening to the special frequency modified music by laying or sitting down from a highly active state to a calm state. This was measurable and repeatable. The music is now being used throughout the Fidelco campus. [Fidelco Guide Dog Nine Month Research Study] Lori McClain-Russak, Manager of Kennel Operations  Fidelco Guide Dog

 Research by Janet Marlow, M.A. , Sound Behaviorist, Founder of Pet Acoustics


AVINE HEARING- Birds are the ultimate musicians! Birds can mimic and create melody, percussive and rhythmic sounds. It is therefore natural for indoor birds to be surrounded by the sounds of other birds and nature placed in their language, music! Janet Marlow has crafted each track to appeal to your bird’s instinct for the companionship of other bird sounds for call and response. This music can also be used to mask unnatural sounds that can agitate birds while left home alone.
EQUINE HEARING is closely related to human hearing, though their capacity to hear higher frequencies is greater. The loud crack of a lightening bolt and the rumbling of thunder is especially unsettling to horses. A horse’s acute hearing as well as their sensitivity to atmospheric changes, often triggers behaviors of agitation and stress.Engine noise and vibrations of the trailer, while transporting your horse are very potent to some horse’s ears. Play this music at a louder volume than you would in the barn to mask some of these sounds. Your horse will associate the calm music to aid in the transition from the barn to the trailer.For horses that are confined to their stalls following surgery or injury, Pet Acoustics music can be used to help minimize abrupt movements and provide a calm atmosphere during the healing process.Pet Acoustics musical compositions reference the inherent rhythmic patterns of a horses gait along with short melodic phrases and upbeat tempos. Play this music on repeat mode to help your horse or horses be calmed and soothed in their surrounding.
FELINE HEARING is three times greater than human hearing. Have you wondered why your cat magically slips away before there is a knock on the door or why your cat gets restless before any sign of a thunderstorm? The ability for cats to detect the highest frequencies and faintest of sounds that exist in the air is astounding and one of the most important senses for their survival in nature.A cat's upright ears assist their acute hearing and helps them capture frequencies humans can't detect. Additional muscles allow them to rotate their ears for surround sound-like hearing. Observing your cat's ears is the best way to know what they are hearing and feeling. Felines prefer long sustained tones and harmonies at a moderate to low volume for their musical taste to maintain their feline state of relaxation. Similar to dogs, calming music provides a sense of well-being in their environment.

CANINE HEARING is much more sensitive than human hearing. As a result, your dog’s alert instinct is triggered by the sounds of a door slamming, a delivery truck arriving or when a thunderstorm is occurring. In the air, where sound travels, exist high and low frequencies and volumes levels that humans can’t hear but dogs can hear. In our homes and in other environments, dogs can develop stress, anxiety, and aggression in reaction to these sounds. Pet Acoustics has designed music for canine hearing by eliminating the high and low frequencies that can agitate canine hearing and behavior. Accommodating dogs in this way creates a relaxing environment to elicit canine calm with music. Dogs prefer long sustained tones and harmonies at a moderate to low volume that maintains their state of rest. Each musical selection is contoured to help your dog’s sense of well-being in their environment.Tip: When you leave your dog home alone, play Pet Acoustics Relaxation Music for Dogs on repeat mode. When you return, you will see that your dog or dogs have been in a calm and relaxed state ready for your companionship.