The "Sound Plate" is designed to simplify elk calling by ensuring perfect placement and angle in your mouth. With a 30-degree angle on the Sound Plate, along with a double-reed design and a "V" cut in the bottom reed, the Imperial Plate Double is exceptional for mimicking cow and herd bull sounds. This "V" cut enhances the raspy characteristics of the herd bull's growl, bugle, and chuckle, making your calls more authentic and effective.