Earcons impose cognitive load because users have to learn what they mean; i.e., they’re not intuitive.
- Limit use to just a few sounds that are easily distinguishable so that users don’t have to learn too many
- Use them in moderation, or they can quickly become overwhelming
- Use them consistently so that users learn to associate the sound with its context
There’s a risk that users might make the wrong association and assume an earcon means something different than intended.
All sounds should align with your brand, complement your persona, and feel like a coherent set. Generally, earcons are as brief as possible; however, when used as greetings, they can be a bit longer.
Visit the Actions on Google sound library for a list of sounds you can use to enhance the user experience of your Action.