![]() ![]() Humans can hear in a range of 20–20,000 Hz (Gelfand, 2010, p. For instance, when you hear a motorcycle accelerating, the frequency of the sound rises as the engine speeds up. These frequencies can be high like the dentist’s drill or low like aircraft. Motorized machinery generates sound frequencies that correspond to the rotation of the motor. Common sounds with high frequencies include most birdsong, the squeaking of hinges, Dremels and other high-speed drills, referees’ whistles, and most digital beeps. Keep in mind that sound frequency goes much higher than the highest notes on a piano!Ĭommon sounds with low frequencies include thunder, large fireworks demonstrations, industrial equipment, the crashing of ocean waves, the rumble of trains and aircraft, and large explosions. The low notes have lower frequencies and the high notes have higher frequencies. To help with the concept of frequency, think of a piano keyboard with the low notes on the left and the high notes on the right. I’ll refer a lot to low and high frequencies because they pose different challenges. Cycles per second is expressed in units of hertz (Hz). What Is the Frequency?įrequency is the aspect of sound that relates to the cycles of the sound waves per second. But sound conditioning of dogs using recordings will always have some substantial limitations that can affect success. Some, but not all of the above problems can be addressed with do-it-yourself work and a good plan. The assumption that lower volume always creates a lower intensity (less scary) stimulus.The length of the sound samples used for conditioning.Lack of functional assessment before attempting conditioning.There are other problems when using apps that can make or break attempts to positively condition a dog to sound. The effects of audio file compression on the fidelity of digital sound.The upper limit of the frequencies generated on all consumer audio.The limited ability of even the best home audio systems to generate these low frequencies in high fidelity. ![]() The inability of smartphones to generate low frequencies, such as those present in thunder.There are four major acoustical problems with using human sound devices to condition dogs. Yet the superior aspects of dogs’ hearing are rarely considered when we decide to use sound recordings in conditioning. Also, dogs can also hear sounds at a much lower volume level than humans can over most of our common audible range (Lipman & Grassi, 1942). But dogs are the big winners in the high frequency range-they can hear tones over about twice the frequency range that humans can (Gelfand, 2010, p. We can also locate sounds quite a bit better than they can (Mills, 1958), (Fay and Wilber, 1989, p. Humans can hear slightly lower frequencies than dogs can (Gelfand, 2010, p. If quizzed, most people would likely guess that dogs have hearing abilities that are vastly superior to ours. Why Many Audio Conditioning Products Fail Sound Conditioning Is Not Always a Perfect Solution. ![]()
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