Ultrasonic Bark Control Devices: Utilizing high-frequency sound waves, these devices emit a noise that's audible to dogs but often not to humans. When a dog barks, the device activates, emitting the sound, which can interrupt the barking pattern without causing harm to the dog.
Spray Collars: These collars feature a mechanism that sprays a burst of citronella or a similar scent when triggered by barking. Dogs typically dislike the scent, associating it with barking, and learn to reduce their barking behavior.
Vibration Bark Control Collars: These devices detect barking through vocal cord vibrations and administer a vibration as a deterrent. They're designed to startle the dog momentarily, interrupting the barking pattern.
Static or Shock Collars: Considered more controversial due to the use of static or mild electric shocks, these collars provide a mild, safe correction when triggered by barking. They come with adjustable settings to ensure the correction is appropriate and not harmful.