Meaning trap
pick up
detect or notice
To notice or detect something — a sound or signal with equipment, or (as 'pick up on') a feeling or hint that isn't obvious.
Don't mix these meanings
Same phrase, different job.
To notice or detect something — a sound or signal with equipment, or (as 'pick up on') a feeling or hint that isn't obvious.
Another meaning of 'pick up' is 'collect'; compare the examples to keep the meanings separate.
Hear it in context
Notice where the phrase sounds natural.
The microphone can pick up even the quietest sounds.
Modern medical equipment can pick up early signs of illness that people might miss.
Fix the pattern
One small grammar move makes it sound right.
Not: The mic didn't pick up on my voice.
Say: The mic didn't pick up my voice.
Equipment detecting a signal is 'pick up + object'; 'pick up ON' is for subtle social cues.
Which sounds natural?
Tap the one a native speaker would say.
'Pick up' is the everyday verb for a device detecting something; 'detect minute fluctuations' is technical.
Build natural chunks
Words that usually travel with it.
pick up + signal
- a signal
- the noise
- movement
- an error
Don't confuse it
Related
Other meanings and phrases to compare.
- pick up (collect) — Another meaning of 'pick up' is 'collect'; compare the examples to keep the meanings separate.