SILENT VOICE INPUT

Implementations of the subject matter described herein provide a silent voice input solution without being noticed by surroundings. Compared with conventional voice input solutions which are based on normal speech or whispering, the proposed “silent” voice input method is performed by using ingressive voice during the user's breathing-in process. By placing the apparatus (10) very close to the user's mouth with a ultra-small gap (110) formed between the microphone (100) and the apparatus (10), the proposed silent voice input solution can realize a very small voice leakage, and thereby allowing the user (1000) to use ultra-low voice speech input in public and mobile situations, without disturbing surrounding people.