At 10/25/2022 06:20 AM, John wrote:
Don't know about you men, but at 79 yrs old my hearing aides make all, especially Motorola speakers sound more intelligible, much less muffled, and because of the aide's high frequency pre-emphasis, audio at 3KHz now sounds plenty crisp and clear!
John W1GPO
I'm 59 & my hearing is fine, yet I also prefer to go higher than 3 kHz on my repeat audio. I maintain several XPR8300/8400 repeaters set to flat unsquelch audio to give them the best frequency response possible. Unfortunately that is only 0-3.1 kHz or so, as the radio internally filters both the TX & RX audio down to that. Passing audio below 300 Hz does give them more realistic sounding audio that all the users say they much prefer (I either pass the users' PL, or strip it via a notch filter & re-encode), but the 3 kHz LPF just makes them sound mushy. If there was any way to bypass those LPFs I would. The TX might be possible via a method similar to what Burt is proposing to do with the Quantar, but the RX with its digital back end is hopeless.
Bob NO6B
