Feedback Identification: Full 31-Band GEQ Flashcards
COMPLETE Standard mix outputs in live sound applications have 31 bands of EQ applied before signal arrives to the system's speakers. These EQs can be used to notch out feedback. Listen to sine waves at these frequencies and identify them by ear to become a feedback sniper: 20Hz, 25Hz, 31.5Hz, 40Hz, 50Hz, 63Hz, 80Hz, 100Hz, 125Hz 160Hz, 200Hz, 250Hz, 315Hz, 400Hz, 500Hz, 630Hz, 800Hz, 1kHz, 1.25kHz, 1.6kHz, 2kHz, 2.5kHz, 3.15kHz, 4kHz, 5kHz, 6.3kHz, 8kHz, 10kHz, 12.5kHz, 16kHz, 20kHz
Name the frequency!
(if you can hear it)
20Hz
Note: Don’t feel bad if you can’t hear this one, especially if you’re listening over a mediocre-to-bad monitoring output like a phone or laptop speaker. Or most earbuds. Or… most things. This is the very bottom of the range of human hearing. Honestly to hear it at all, you’ll probably need a subwoofer.
Name the frequency!
(if you can hear it)
25Hz
Note: Don’t feel bad if you can’t hear this one, especially if you’re listening over a mediocre-to-bad monitoring output like a phone or laptop speaker. Or most earbuds. Or… most things. Most people can’t hear it anyway. Honestly to hear it at all, you’ll probably need a subwoofer.
Name the frequency!
(if you can hear it)
31.5Hz
Note: Don’t feel bad if you can’t hear this one, especially if you’re listening over a mediocre-to-bad monitoring output like a phone or laptop speaker. Or most earbuds. Or… most things. Most people can’t hear it anyway. Honestly to hear it at all, you’ll probably need a subwoofer.
Name the frequency!
(if you can hear it)
40Hz
Note: Don’t feel bad if you can barely hear this one, especially if you’re listening over a mediocre-to-bad monitoring output like a phone or laptop speaker. Or shitty earbuds. This is in the range that often requires a subwoofer or another special low-end driver to be heard.
Name the frequency!
(if you can hear it)
50Hz
Note: Don’t feel bad if you can barely hear this one, especially if you’re listening over a mediocre-to-bad monitoring output like a phone or laptop speaker. Or shitty earbuds. This is in the range that often requires a subwoofer or another special low-end driver to be heard.
Name the frequency!
63Hz
Name the frequency!
80Hz
Name the frequency!
100Hz
Name the frequency!
125Hz
Name the frequency!
160Hz
Name the frequency!
200Hz
Name the frequency!
250Hz
Name the frequency!
320Hz
Name the frequency!
400Hz
Name the frequency!
500Hz
