I'm trying to find someone who experiences hearing the world like I do

Directional microphones roll off at 6dB per octave.

I’ve googled it for you…..

A hearing aid directional microphone inherently rolls off low frequencies at a rate of 6 dB per octave due to the internal spacing subtraction between its dual ports, requiring specific frequency equalization to match an omnidirectional response. [1, 2]

Frequency Response and Equalization Mechanics

• Low-Frequency Roll-off: The subtraction process between the front and rear microphone elements inherently reduces low-frequency sensitivity, causing a 6 dB-per-octave slope where low-frequency sounds are attenuated. [1, 2, 3]
• Equalization Trade-off: Hearing aids apply internal amplification (equalization) to boost these low frequencies so the overall frequency response mimics an omnidirectional microphone. However, boosting low frequencies electronically also increases internal microphone noise. [1]
• High-Frequency Performance: Directional advantage is most prominent and stable in the mid-to-high frequency ranges (typically above 1,000 Hz), which are critical for consonant discrimination and speech understanding in noise. [1]

Factors Impacting Frequency and Directional Response

• Port Spacing: The physical distance between the two microphone openings dictates the internal time delay and limits low-frequency directional effectiveness. [1, 2]

Wow, that's something new for me, thanks...!

Should be even better with UP and new titanium mold.

WH

@WhiteHat said:

Should be even better with UP and new titanium mold.

Indeed. My AuD have just announced that my new titanium no vent cShell and repaired titanium cShells with 1mm diameter vent just came.

However, I'm unexpectedly stuck in different area of Poland for at least a few weeks 😢