Macfun,
You joined this forum Monday. Welcome!
So I understand the basic curiosity and questions.
First: Cameras aren't "security", per se. Alarm systems, esp monitored alarms are.
2nd: Cameras can augment security systems, and show "who done it"
a camera event such as, motion detection within a certain area could trigger a light to turn on or a dimmed light to go bright or a strobe to activate or a dog barking sound to play within your home
You're talking "home automation" at this point. A camera won't tell a dimmed lite to go brite.
A camera event could cause a dog bark mp3 toplay (with some clever work)
is there a way to detect a dog barking sound and then take action on that event
Cameras can detect audio events. I gave up. Planes and other noises caused too many false alarms.
The action item might include: flashing a light, recording the date and time of the event, recording audio/video of the event, playing an ultrasonic sound that tells the dog to shut up!
You're a recent member of the forum. Welcome.
Please get up to speed on how to research the questions and answers to other new members.
There is a wealth of Q&A here. And learning is faster if you dig thru that treasure trove.tune
Lastly, basic questions from newbies are so similar, and so basic, that the experts here have become fatigued answering them, over and over.
Not to dis you. Jus sayin'
Do your homework, your research. When you ask specific, detailed questions, you'll get awesome answers.
Folks that don't put in that effort, and want experts to educate them, and solve their particular camera situation, don't get worthwhile answers.
Fastb
PS: tangent and looney2ns had excellent advice