Invisible important DVR usability
You might have experience that your DVR warning you are in over speeding or there are speed camera ahead by making sound to telling you. How to ensure driver could get DVR sound warning in noise driving scenario by through comfort sound tone !? it's part of usability objective we need to care about.
Where does these sound come from?
In DVR product, usually using smaller size speaker component, there are Flexible & Fix type component we could see in DVR product. Flexible type speaker usually stick on shell cover, so it able to adjust speaker hole location. And fix type component is literally fix on placement, so it is disable to do hole location adjustment.
At least 15%-20% speaker hole open rate
< Minimum open rate Depend on spec requirement >
To ensure sound quality, usually the speaker hole design need to reach the minimum open rate requirement based on component spec. of course open rate the bigger the better. below is example telling how to calculate basic open rate requirement.
Sound quality enhancement｜Sound Box
If you want to enhance sound DB in effective way, you won't to miss this feature : Sound Box
it based on resonance theory by through small & sealing space hollow box resonance to make sound louder.
And speaker sound box application we can always to see in various product in our life.
Speaker hole need go through safety certification
We can do beautiful & nice pattern for our ID speaker hole design, but there is safety certification rule we need to follow, to protect user and product itself.
Every product speaker hole size design all follow certification rule ( width < 1mm)
Shell cover hole
Mesh & Grill cover
Eventually to give user good sound experience
Sound quality is very important usability for dash-cam scenario, user & client always concern it. that we by follow so many acoustic design rule, purposely to give our user a better & positive product experience, that Mitac design team always do =)
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