100 ea 16 Gram Threaded CO2 Cartridges by Mosa
16 Gram threaded CO2 cartridges Food Grade, no oil 3/8″ thread with 24 threads per inch
What is Dog Whistle that only dogs can hear ?
General information about the whistles
The construction of the first whistle was developed by Briton Francis Galton back in 1883. Hamilton was the trainer and whistles used in the circus. Today whistles can be used for all types of pets. It is known that dog, unlike humans, can pick up sounds that emits dog whistle. In practice, it is clear that the dogs pay for such sounds much more attention than a human team.
High frequency sound is fed the dog shows that the animal must be made as opposed to master voice, tone, which can vary. In such cases, the animal can not understand what he wants from her man, accordingly, it will not feel so confident. Experts recommend training dogs to work with a whistle from puppy hood.
We now turn to the principle of operation of these attributes. It is no secret that the whistle emits acoustic vibrations. To help you be more clear to its operating principle, we consider it on the example of a conventional kitchen knife that hand movement through the air. In this case, the blade – this attribute cylindrical cavity. Instead, pressurized gas is supplied air which is necessary for the emergence of sound vibrations.
In the case of the example it is characterized by frequency sound vibrations’ nozzle sizes. Today, virtually all models of accessories that are sold in the domestic market, operating at a frequency of 170 kHz. This rate is too high for a person, since the human ear can perceive signals whose frequency does not exceed 20 kHz. Accordingly, the sound emitted by the whistle can be heard by man. Pet, in turn, are able to recognize the sounds similar to a distance of 450 meters.