I realize this may be a bit OT for HN. My karma here's generally decent, and on a personal level I could really use the help.
Also, this and some other experiences with noise have me thinking again about learning to design products and services that help people document unreasonable noise and get it addressed. Whether a malfunctioning appliance or piece of equipment, or the neighbour kids with the booming subwoofer. Timing, localization, and calibrated measurement of intensity.
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It's actually been a series of noises that have changed after each of the two attempts at repair. I have an older analog tape cassette recorder whose built-in microphone captured the first sound fairly well.
The built-in microphone of an old iAudio MP3 player with a record function didn't capture that sound well, but it did capture the lower sound made after the first repair.
Between the two devices, I assumed one would capture the "in between" sound that followed the second repair. However, both built-in microphones seem to be "dead" in that frequency range.
I borrowed a Sony "stick" digital voice recorder when the first repair produced the second noise profile, but it did not seem to register this at all. I don't have the manual for it, but I've played with / guessed at its settings, and it is now picking up the third noise following the second repair to some extent, but not too well. It does have a microphone in mini-jack.
P.S. While I've learned that more minor noise with this unit hints at the real trouble to come, I'm not what is just a minor background noise. I'm speaking of "wake you in the middle of the night", give you headaches at your home office work desk types of noise. Unfortunately, since particularly the more recent noises are intermittent, I can't count on them manifesting for the very limited time a service technician may be on-site.
Also, this and some other experiences with noise have me thinking again about learning to design products and services that help people document unreasonable noise and get it addressed. Whether a malfunctioning appliance or piece of equipment, or the neighbour kids with the booming subwoofer. Timing, localization, and calibrated measurement of intensity.
--
It's actually been a series of noises that have changed after each of the two attempts at repair. I have an older analog tape cassette recorder whose built-in microphone captured the first sound fairly well.
The built-in microphone of an old iAudio MP3 player with a record function didn't capture that sound well, but it did capture the lower sound made after the first repair.
Between the two devices, I assumed one would capture the "in between" sound that followed the second repair. However, both built-in microphones seem to be "dead" in that frequency range.
I borrowed a Sony "stick" digital voice recorder when the first repair produced the second noise profile, but it did not seem to register this at all. I don't have the manual for it, but I've played with / guessed at its settings, and it is now picking up the third noise following the second repair to some extent, but not too well. It does have a microphone in mini-jack.
P.S. While I've learned that more minor noise with this unit hints at the real trouble to come, I'm not what is just a minor background noise. I'm speaking of "wake you in the middle of the night", give you headaches at your home office work desk types of noise. Unfortunately, since particularly the more recent noises are intermittent, I can't count on them manifesting for the very limited time a service technician may be on-site.