FrequenSee App to calibrate Ultrasonic volume

[rgrilled]

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.

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.
Is there a recommended volume reaching the ear?
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?

[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.

[UniversalMan]

@Shannon
I know...more stupid questions
I have a question that is been bugging me for some time...
Volume of the ultrasonic track....

I play the ultrasonic on an first gen Ipod nano (not that it matters...and I cant base the volume on clicks), on speakers....and adjust the volume with frequensee on my cell phone.

It seems I can't find anywhere on the forum or site the value of -db that should be at my listening distance....

I tend to put it around -30db at the place where I sit or lay (not measured at the speakers).

Am I doing it wrong?
How much -db should it be at my listening distance?
Btw the room is really big (open space) so take that in a variable.
Also keep in mind that I cannot effectively calibrate the volume with masked subliminal, cause I can't hear a range from 10db to 20db .

[Shannon]

@Shannon
I know...more stupid questions
I have a question that is been bugging me for some time...
Volume of the ultrasonic track....

I play the ultrasonic on an first gen Ipod nano (not that it matters...and I cant base the volume on clicks), on speakers....and adjust the volume with frequensee on my cell phone.

It seems I can't find anywhere on the forum or site the value of -db that should be at my listening distance....

I tend to put it around -30db at the place where I sit or lay (not measured at the speakers).

Am I doing it wrong?
How much -db should it be at my listening distance?
Btw the room is really big (open space) so take that in a variable.
Also keep in mind that I cannot effectively calibrate the volume with masked subliminal, cause I can't hear a range from 10db to 20db .

We measure volume at the source of the audio, because that is the way it must be done if you are playing the program on a cell phone and running FrequenSee on that same cell phone.  Even that isn't an ideal way to do it, because each model of phone puts the speaker and microphone in different locations relative to pone another.  But it's what we have to work with.

I have no way to measure what the volume should be at listening distance because that is so variable.  So you need to use your cell phone to measure the volume at the source, which in this case is the speakers.

One way to deal with this is play a masked track and adjust the volume to your liking for your listening distance, and then use whatever other track you prefer.  You say this isn't possible because you can't hear a range from 10 to 20 dB.  I'm not sure I understand that - decibels is volume.  Are you sure you don't mean 10 to 20 Hz (pitch)?  Is there something with your speakers or ears that would prevent hearing that specific volume range?

[UniversalMan]

Nope, it is indeed db
So from 0-10 i hear perfectly, than there is a gap 10-20 db, and after that i hear normaly.

Will figure it out.
Thanks for the answer.

[Shannon]

That sounds like a cut filter set for that volume... which would have to be either a hardware or some sort of OS or player thing, most likely. If it's playing that volume, but you can't hear it, then it's something with the player or speakers most likely.

[UniversalMan]

No Shannon I am talking about my ears...I heave been tested, I was born like that. (Well that didnt stop me from playing the Bass )

[Shannon]

No Shannon I am talking about my ears...I heave been tested, I was born like that. (Well that didnt stop me from playing the Bass )

Oh, wow.  That's fascinating.  I wonder how that is possible?  Pretty cool way to be unique!

[UniversalMan]

The ear specialists thought I was messing with them.

So they did not one test but 5 tests in a row...than they thought I have bad hygiene so they pressure washed with tiepid water my ear canals....and after that the final test did show the same.


Than back then my doctor said to me that by the age of 30 I will be wearing hearing aids...well...she was wrong.
Hahahhhaha

Btw... I have your hearing aid sub....but it still is not on my play list...

["Q"]

**Caution when using FrequenSee**
In case it has not been pointed out before - Please be aware that FrequenSee gives a "false" ultrasonic reading when using the app on a phone PLUS the wifi/data is switched on.

I do not know whether the ultrasonic reading is due to actual subliminal ads in FrequenSee, or whether it is simply "noise" generated once the Ads are running (due to Wifi/data being on), but if you are checking your speakers for US output whilst your Wifi/data on your phone is on, then it will give a false positive (and false US volume reading). So, make sure you switch the wifi/data "off" when using FrequenSee to check for US output/volume