On the complex subject of a dog’s hearing, it is safe to say that dogs can hear with approximately ten times more efficiency than a human.
By one estimate dogs can locate the source of a sound in 0.6 seconds of a second. Their ears have many sensory nerves – which is a good reason not to blow playfully into them. Gentle as the blowing may be, and even though you can scarcely hear it, the level of amplification inside the ear is enough to cause distress in a dog. A dog has whiskers on its muzzle, under its jaw and over its eyes. Known as vibrissae, they are sensitive to changes in ‘air dynamics’.