This module is an approaching in the functionality of searching by voice in Magento 2.
Enable/Disable Search by Voice Recognition Devices Scope (desktop or mobile or both: desktop & mobile) Input Seach-Id (dom) Configurable. Voice Languages Recognition: Spanish and English Doonfinder® [Beta] Compatible
iOS not support this API for now. But there's a "Global Usage" of 60% and 73% in Spain (source: https://caniuse.com/#feat=speech-recognition )