It sounds to me that your voice is NOT fading in any way ON or after the attack at least not due to an electrical issue.
What I do hear is the following. You voice does not sound supported after the phrase is complete. In other words you are stopping. That might be what you want. For some phrases it sounds like you are holding a note after the word is sung but not pushing more air through. This will sound faded and the only way to avoid that is to push more air through at constant pressure. On some phrases your voice is staccato so there is no reason to expect a sustained note. It sounded to me in one or two instances that you may have moved your head away from the mic during a phrase. I suppose this could have been electrical too but it really sounded like your head was moving. If you are trying to record yourself in a studio you want to avoid this.
If you think you have a problem with the sound not being at peak on the attack then I'd ask if you are using software to record yourself or mixing this down onto a disk. I'd assume the former as almost no one uses tape or other physical media anymore. The process can degrade sound quality. Also, many microphones and audio platforms have a voice activated option in them. They only start responding when the first impulse is detected. This can be annoying and lead to a ramped up voice rather than a hard start and if you are saying something with a hard consonant in the beginning that can be missed. If this is the case you should be able to find that out by reading the specs for the mic and recording s/w. Hopefully that can be turned off. But in my opinion I did not hear that.