I can't say I've heard any voices (yet ) or bumps, but the room tends to get cold when I meditate or especially when I cleanse the chakras. The lamp tends to flicker a lot as well.
Audio-voyance is a very slow process, and is so for your benefit. A sudden, startling intrusion into our lives would be counter-productive to all, as it creates a fear. As you slowly exchange trust with benevolent souls, the audio-voyance will increase. It's telepathy developing.
The flickering lights may also be due to the increase of YOUR vibration, while the incadescent bulb's regular cycles remain unchanged.
Much like video picks up television pictures all flickery, because the lines-of-resolution aren't on the same oscillation "refresh".
Cold in the room CAN indicate a nasty entity (energy vampire), so always bring good thoughts and guidance into your room.
I imagine this is a higher being since it is the only explanation I can think of, but do we need to communicate with these beings or simply allow their presence in our field? Are they trying to reach us and communicate with us, or is it simply the frequencies mashing together as you said? I've never had any prior experiences with higher beings (consciously) so I'm pretty clueless as to how I deal with this...
Both malevolent AND benevolent entities vie for our attention. You point out the importance of developing a good communication with your guide spirits. If you take to heart what I said about dog whistles and untraviolet light, then you understand how higher-frequncy sentiences can assist us. There is no guarantee that less-than-amiable sentiences get into those realms...did you ever see a 2-year-old who DIDN'T get into the kitchen cabinets??...so developing discernment is important, too.
Please Do take your time: this isn't a race, and the more caring effort you put into your journey, the better the results...not just for you, but those around you. 4th Dimension Baby Steps
Also, supportive of Dr. Emoto's work: Star Found Shooting Water "Bullets"