This provision is a "subjective immission" control. Most relate to barking dogs and put an upper time limit for continuous sound from them. New Jersey (Chapter 13:1G) considers a violation if the sound is continuous for more than 5 minutes or intermittent for more than 20 minutes. They also consider it a defense to violation if the animal is provoked to bark. Connecticut (Chapter 442)exempts animal sounds while Anchorage, AK (Chapter 15.70) requires that continual violations permit the animal to be taken and put out for adoption.