The United States Patent and Trademark Office today published a patent filed by Apple in March 2014, which depicts an Apple Watch automatically adjusting an iPhone's audio volume or other alert characteristics based on ambient sound samples (via AppleInsider).

The invention would be most useful in noisy environments where alerts might otherwise go unnoticed or unheard. The system could also serve to automatically lower iPhone ringtone or notification volume in quieter situations.

The patent details an Apple Watch using its microphone to listen to ambient sound at regular intervals or when triggered to do so by a host device. Using the data collected, the Watch analyses the difference between the background noise and the alert audio level, and makes a volume adjustment accordingly.

Ambient audio sensor patent
The system is also able to work out the iPhone's orientation and location in relation to the user's body, including whether the handset is tucked in a pocket or stowed away in a bag, in order to account for physical sound barriers.

In one example, an iPhone sends a notification audio signal to the Watch before playing an audible alert. The receiving timepiece analyses the wave signal and compares it against a stored reference signal based on ambient noise samples. Through a combination of sound threshold analyses, the Apple Watch then sends the appropriate command to raise or lower the iPhone's output volume.

ambient audio sensor patent
The invention could also be used to filter audio signals received by voice-activated control functions -- for example, by increasing the physical distance that a user can successfully activate Siri using the "Hey, Siri" spoken command.

Apple has researched the use of sound sensors before as a possible accompaniment to existing light sensors in its devices. However, ambient sound monitoring is now an established technology in the consumer space, for instance in several auto-adaptive noise cancelling headphones, suggesting implementation of the feature in Apple products could happen sooner rather than later.

Related Roundup: Apple Watch Series 9
Tag: Patent
Buyer's Guide: Apple Watch (Caution)

Top Rated Comments

MentalFloss Avatar
109 months ago
"Sound sensors"... previously known to experts in the field by the obscure little-used technical term "microphones".
Score: 12 Votes (Like | Disagree)
GubbyMan Avatar
109 months ago
I don't understand. Why can't they just completely silence the iPhone and use the Taptic Engine in the WATCH to alert the user?
Score: 7 Votes (Like | Disagree)
FieldingMellish Avatar
109 months ago
Any reason the iPhone can't do the same thing? Here's Apple coming up with reasons to augment watch sales beyond the current installed base.
Score: 3 Votes (Like | Disagree)
User 6502 Avatar
109 months ago
Any reason the iPhone can't do the same thing? Here's Apple coming up with reasons to augment watch sales beyond the current installed base.
If the iPhone is in a pocket the sound it receives is muffled, so it might think the environment is very silent and hence reduce the notifications volume. However in this scenario it should raise it instead.
Score: 3 Votes (Like | Disagree)
springsup Avatar
109 months ago
The system is also able to work out the iPhone's orientation and location in relation to the user's body
I hope they use this to implement a compass for the gen.1 watches.

Lack of direction indicator for walking directions is the biggest flaw with the device, in my experience.
Score: 1 Votes (Like | Disagree)
jonnysods Avatar
109 months ago
It's pretty amazing tech they are developing. The whole thing sounds like another battery drain with the constant sensor checks. I can adjust my alert sounds as I go about my business, I've done it since the first iPhone in 9 years ago...
Score: 1 Votes (Like | Disagree)

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