Oak Ridge
UKC Forum Member
Registered: Aug 2003
Location: Indiana
Posts: 6168 |
Whistle Pig,
There are two factors that control hearing. Pitch or frequency, and volume or intensity.
We measure pitch in Hertz, or "vibrations per second". The higher the pitch, the faster the vibration. Remember that, we'll come back to that....
The intensity we measure in Decibels. It is truly a measure of how much we alter the air by sound. The more energy that is exerted into the air, the more decibels, or "louder" the sound will be.
Now....based upon that, we know that sound waves travel in the same manner as the waves on a pool, when a pebble is dropped onto the surface, in a concentric pattern. As the wave travels, the waves lose energy or in the case of sound, volume.
You will also notice that as the distance increases, and the wave loses energy, the frequency changes as well....the resistance of the water in the pool, decreases the frequency of the waves.
Fog horns operate at a higher Decibel range, and that is why they are easily heard for longer distances.
All things being equal, high pitched sounds of the same intesity (volume, or decibels) travel further and are perceptible by the human ear easier......
It may be easier to have a low pitched hound mouth with more decibels, that I don't know....
I also know that the older we get, the less sensitive the human ear is to low frequencies (pitch)...so maybe since I'm an old fart....that's why it's easier for me to hear a higher pitched dog.
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Joe Newlin
UKC Cur Advocate
Home of Oak Ridge Kennels
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