WhiteCap contains thousands of visual combinations, real-time audio response, configurable on-screen menus, and an extensive library of visual content.
They are used in TV, telecamera,audio andvisual recorder,microprocessor and other electronic equipment for resonance ,osilating coupling, delay, filter, trap, choke and etc.
Methods Video-stroboscopy was used to reveal the laryngeal cavity and dynamic changes of the vocal fold, and sound spectrograph was used to examine audio frequency, pitch and width.
To control stepping motors, the balance bridge power drive circuit is made up by TDA1521 integrated audio power amplifier, the pulse allotter is made up by the parallel ports of computer and latches.