WhatsApp for iOS is working on a redesign voice messages feature. Similar to Instagram, the chat app will show waveforms when the user is recording a message.
According to WABetaInfo, WhatsApp is testing this feature for iOS and Android users. It’s not available yet for the public, but the site managed to give a demo of how this function will work.
While the user records a voice message, WhatsApp shows real-time voice waveforms. While recording, the user can also stop recording and listen to the voice message before sending it. As for now, there’s no way to easily stop recording the message to hear yourself.
9To5Mac