This is especially important when using the Push-to-Talk pattern. To make sure the user knows that the application is listening, signal clearly when the microphone button is pushed down. Signal clearly when the microphone button is pushed down. WhatsApp has a good implementation of the design in their app. You can also add a slide as an optional gesture to lock the microphone for a longer period of time. On the desktop you can use the spacebar for activating the microphone. This also decreases latency by making endpointing very explicit, eliminating the possibility of endpoint false positives (system stops listening prematurely) and false negatives (systems does not finalize request after the user has finished the command). When the user is required to press a button while talking, it’s completely clear when the application is listening. Push-to-Talk (Button on Screen or Physical Key/Button on Device) is the best way to operate a microphone in an application with a Multi-Modal Voice UI. There are also privacy risks that are inherent with a Wake Word that are altogether avoided. The hands free scenario is less relevant than you might initially think, as the user is already holding or within close proximity to a device. While voice assistants use a wake word so that they can be activated from a distance, your mobile or desktop application doesn’t need to. You can hide the tips after the user has tried the Voice UI. Guidance tips should be placed close to where the visual feedback will appear. When a user sees a Voice UI for the first time, they will need some guidance on how to use it. Rather you should evaluate which tasks in your application are the most tedious and easiest to do by using your voice. A Multi-Modal Voice UI should blend as a UI Feature alongside existing modalities like typing, tapping, or swiping. There’s no need to replace your current user interface with an Assistant based Voice UI. On the other hand, touch is often the better option for quickly selecting from a couple of options. Voice works great for use cases such as Voice Search – “Show me the nearest seafood restaurants with three or more stars”, Voice Input – “Add milk, bread, chicken and potatoes”, and Voice Command & Control - “Show sports news” or “Turn off all lights except the bedroom”. Good design is about providing the user with the easiest tools for completing a task. Give visual guidance on what the user can say It should react by updating the user interface, just like when clicking a button or making a search. In most cases, the application should not answer in natural language. Be clear that the user is talking with a computer, don’t try to imitate a human. With a Multi-Modal Voice UI, speech has only one function: Command and Control the system to do what the user wants. This is very human-like, but not the way we want to communicate with a computer. We use different tones and emotions to give different meanings to our words depending on the context of a situation. When humans talk with each other, we do more than transmit information by using words. As the user speaks, the user interface should be instantaneously updated. Instead of back and forth “Conversational Experiences”, Multi-Modal voice experiences should be based on real-time visual feedback. Certain hand’s free scenarios can be a good fit for the Voice Assistant model, such as IVR within Contact Centers, but it is not the best model when a user has access to a screen. Voice Assistants are digital assistants that are built for “Conversational Experiences” - where the user speaks a Voice Command and the system typically utters back a Voice Response. All of these experiences are conversational in nature, optimized for hands-free use with voice, and overlook the best uses of a Voice UI in a Multi-Modal context. We contrast the “Speechly Model” to the popular “Voice Assistant Model” for Voice UIs seen in products like Apple’s Siri, Google’s Assistant and Amazon’s Alexa. You can also think of a Voice UI as a controller for app actions which makes it retrofittable to an existing application. As a result, a Speechly powered website/app can be controlled with both the Voice UI and the Graphical User Interface (GUI), allowing the user to choose the best input method for the occasion. We believe Voice UIs should blend alongside existing modalities - like typing, tapping, and swiping - and take advantage of a visual display for providing real-time feedback to the user. In this article, we'll introduce the concepts and guidelines we've found effective in creating Multi-Modal Voice experiences that enable users to complete tasks efficiently and effectively.Īt Speechly, we approach Voice as an Interface. For the past 5 years at Speechly, we have been researching and developing tools to easily add Fast, Accurate, and Simple Voice User Interfaces (Voice UIs) in Mobile, Web, and Ecommerce experiences.
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