The phrase "acoustic alert" is correct and usable in written English.
It can be used to refer to a sound-based notification or warning signal, often in contexts related to technology, safety, or communication.
Example: "The system will issue an acoustic alert when the temperature exceeds the safe limit."
Alternatives: "audio warning" or "sound alert".
In 2011 the European Commission drafted a guideline for Acoustic Vehicle Alerting Systems (AVAS).
The European Parliament approved legislation that requires the mandatory use of "Acoustic Vehicle Alerting Systems" for all new electric and hybrid electric vehicles within 5 years.
In April 2014 the European Parliament approved the legislation that requires the Acoustic Vehicle Alerting Systems, which is mandatory for all new electric and hybrid electric vehicles.
The draft legislation states a number of tests, standards and measures that must first be developed for an Acoustic Vehicle Alerting Systems (AVAS) to be compulsory in the future.
This device, now known as an Acoustic Flow Monitor, alerts nearby stations to possible lahars.
The applause of a few imperceptible well-placed actors — alert to acoustics, mass psychology and the technical challenges that face a performer onstage — can switch on an audience much as a pilot light ignites a gas oven, prompting neophytes to recognize that they are witnessing something virtuosic.
Things get really wild in the second episode, which involves Fox getting to the bottom of what Stonehenge might have been built for (spoiler alert: some kind of acoustic healing device).
The Royal Air Force (RAF) had positioned a Short Sunderland flying boat off the harbour to search for any movement to or from the port and this was detected at 17:55 by acoustic locators and again at 20 40, alerting the defenders.
The goats reacted alert to the visual and/or acoustic stimuli that were presented in their room.
