The studies are part of a new trend: to look for integration of response rather than investigating each part/function separately. The fMRI studies show that touch has a wide impact on the brain, influencing our sensations, our movements, our thought processes and our capacity to learn new movements.
Dogs are most sensitive to sounds in the frequency range from 500 to 16kHz. REVERBERATION TIME. This is the time for a sound to decay to 60dB. Kennels by their nature have poor acoustic properties; hard, smooth surfaces do not absorb noise, therefore any noise generated tends to reverberate inside the building.
There is no threat of aggression signaled by the dog unless it is lower pitched and mixed with growls. Let's consider the interpretation of the most common barks. Rapid strings of 2 to 4 barks with pauses between is the most common form of barking and is the classic alarm bark meaning something like Call the pack.