Questions tagged [acoustic-noise]

I bought a power strip like this one: https://www.elettronew.com/31192-large_default/universal-power-strip-for-5-sockets-with-switch.jpg and I noticed if I get very close there is a really low electrical sound, like a buzz; I tried with a different…

I have a Dell LCD (LED backlight) without speakers which produces an audible "hiss" when connected the HDMI input. DisplayPort much less. I have recorded the following spectra: monitor off (this is about the minimum the phone can record, so it's not…

I have a 100W D class amplifier that runs on 24V. It uses 2 x TPA3116D2 IC for amplification. I also have a 24V 16A power supply. I need to provide a soft start circuit for this, because the amplifier is not protected from pops and clicks. I came up…

I come across such descriptions as below when I read about "90 dB SPL with 1 watt, measured at 1 meter distance" or "Sound pressure level of 90 dB 1 W/1 m". Another example is: "Reference test gain (60 dB SPL input)" How can these be explained…