Different feedback on iPhone 7 Home button depending on pressure

[JTToft]

So I have a question. Can anyone give any explanation as to why the iPhone 7 Home button gives two different degrees of feedback (both haptic and auditory) depending on the amount of pressure used in the press?
I am not talking about the 3 different sensitivities that can be set in Preferences, but about a difference within the same sensitivity setting.
The two different presses don't result in any functional difference. They are both just regular Home button presses.

To make sure I wasn't imagining things, I made a sound recording of 4 firm presses followed by 4 light presses and blew up a waveform of that recording to visualise it.

Anybody?

(iOS 10.0.2)

 

[uwdude]

I don't seem to be able to get this to happen on mine, maybe my fingers aren't sensitive enough.

 

[JTToft]

I don't seem to be able to get this to happen on mine, maybe my fingers aren't sensitive enough.

- Thanks, though. I spoke with a few others before posting here also to make sure I wasn't crazy. Some of them were also able to perceive two different presses on their phones. The waveform seems to visually confirm it independently of subjective sensations.

 

[leon44]

If you apply more pressure you might be dampening the sound/vibration harder with your finger (absorbing more of the energy) so the waveform might not be proof, maybe I'm wrong.

 

[JTToft]

If you apply more pressure you might be dampening the sound/vibration harder with your finger (absorbing more of the energy) so the waveform might not be proof, maybe I'm wrong.

- I don't think so. Firm presses produce louder sounds, not quieter sounds, and the sound is produced by the bottom speaker which wasn't touched in my experiment.