These days every flagship smartphone is IP67 minimum certified which ensures the smartphone stays waterproof for up to 30 minutes if submerged in 1 meter deep water.
Most of the smartphones use oleo phobic coating to keep the ports water free. However, Apple in its new patent application 2017/0127163 titled, ‘Hydrophobic Mesh Cover’ describes how their hydrophobic coating design ejects the water out of the speaker.
The patent describes a mesh screen cover that is hydrophobic in nature to resist the entry of liquid in one area and a hydrophilic area which aids in the removal of liquid in the iPhone’s audio chambers. Apple’s patent application explains that the inner side hydrophilic coating is basically to speed up the removal of water out of the iPhone and mentions the use of a sensor in the acoustic chamber of the phone itself. For this, the speaker may also be designed in a new way which would send an audio pulse blast not audible by the human ear while sending the water out of the iPhone where it entered. The process is likely to work in a similar fashion as Apple Watch 2’s tiny speaker which ejects the water out. As this is just a patent application, one can only speculate on which iPhone they are likely to incorporate such designs.
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