I have designed a proposal logo for SteemAssistant, a voice-based steem interface, which uses the genius of Smart Speakers to make good use of their voice recognition and wide possibility of human voice interpretation. To know more enter here.
The logo contains the S and the A referring to SteemAssistant, the S with its shape refers to two chain links, representing "Blockchain".
The waves on the sides represent sound waves (voice). The logo was done in a minimalist way (so it was requested) which makes it look quite simple but attractive, seeing the waves on the sides you immediately know that it is some voice, is what you want.
PhotoshopCC