Oh, sorry. I didn’t realize we were using your personal, specific definitions for so many words.
This study is related to the use of natural ventilation silencers for the howling and barking (hereafter referred to as “barking”) of dogs. With the spread of nuclear families, low birth rates, and aging populations, pets play an important role in advanced nations. In Japan, the number of complaints and problems caused by the noise created by barking dogs is increasing; it represents the major component of noises in living spaces, thus necessitating some sort of countermeasure. In addition, dogs in veterinary hospitals are housed in connecting cages; one dog’s barking can cause others to bark as well, creating stress in the other animals in the hospital.
One method being considered to remedy this situation is the attachment of a sound insulating board to the opening of the cages and the utilization of forced ventilation. However, the use of sound boards and forced ventilation creates a number of issues, including problems such as hindrance in communicating with animals, noise associated with ventilation intake and output, noise from fans within cages, cost, energy consumption, and the risks of malfunction and power outages; collectively, these problems make this solution unfeasible. […]
We created a prototype based on resonance within a rectangular chamber divided into cells, adding nonwoven sheets to the interior, tail pipes, and coaxial side branch tube silencers to the open end. We then assessed the sound attenuation performance.
{ International Journal of Mechanical Engineering and Applications | PDF }
