FrequenSee App to calibrate Ultrasonic volume

[Shannon]

Hi Shannon and Ben,

I started my AM6 journey, and will mostly be using the ultrasonic tracks.
I've been using the  FrequenSee App to do my final checks of speaker volume.


But what I've noticed it's measuring a peak around 17khz-18khz, then drops fast towards 20khz (I attached a screenshot)
Is this a sign that my speakers are not good enough to handle the ultrasonic track?
The specs for the speakers is listed at 20khz, but there's no other way for me to confirm this. There is no crackling sounds ever. But I do hear a smooth high pitched sound when I increase the volume.

What you are seeing is the audio signature.  If you were to use Audacity to view the pitch without even playing it, you would see much the same thing.  It's not your speakers; it's designed to use the full potential of your speakers, but not go above that.

Also, you recommend a max of 27kHz at the source, and I've done this by putting the microphone right in front of the speaker drivers.

A max of 27 dB, not kHz.  dB is volume, kHz is pitch.  And please remember that -27 dB is the maximum recommended volume, not necessarily the best volume for all situations.  

Is there a recommended volume reaching the ear?

At any reasonable volume, you'll be fine as long as you are within the same room as the speaker, the volume is set properly and the room is not bigger than normal.  If you play your subliminal on a cell phone using a 15 click volume adjustment option, and you play a masked track at 13/15, you'll find that you can hear it quite a ways away.  I can hear it in my kitchen, while it is playing down the hall, through the bathroom and in my bedroom.  If you're in the same room, in any reasonably sized room, you should be fine.  However, the best option is to keep the player within 10 feet of you, once you have selected the optimal volume.  

I assume that depending on distance to the speaker, the volume at our ears will fade accordingly. Is it a good idea to take a measurement near our ears?

Not necessary, as, since you said, the volume will change at the ear depending on the distance from the ear to the speaker.  Which will usually change frequently.