Bad audio design. Beeps should be reserved for errors. Success should be indicated by a happy chime. But most of all, it is being cheap and using a piezeoelect

Bad audio design. Beeps should be reserved for errors. Success should be indicated by a happy chime. But most of all, it is being cheap and using a piezeoelectric buzzer driven on/off instead of a speaker driven by a small routine that would produce a pleasant sound. Microwave ovens used to sound a bell when they were done, back when timers were mechanical.