But sometimes we need other stimulation besides reading our favorite novels or histories or comic books. (bookpage.com)
There are several signaling modes available in shock collars like light, tone, or vibration, but primarily you should apply light mode before other stimulation. (dogguidereviews.com)
The baby cries to create kind of a white noise and block out other stimulation to be able to fall asleep, and / or (askmoxie.org)