ANC or ENC: which one actually matters for phone calls?
Two acronyms that appear on the same box and do opposite jobs. One changes what you hear, the other changes what the caller hears. Most people buy the wrong one.
Three terms show up on nearly every earbud listing, and they do not mean the same thing. Getting them confused is the most common reason people are disappointed by a pair that technically matched the spec they wanted.
Passive isolation
This is just physics. The ear tip seals your ear canal and blocks sound the way an earplug does. Getting the tip size right does more for noise than any feature on the spec sheet, and it costs nothing. Most people never try the other sizes in the box.
ANC: active noise cancellation
A microphone on the outside of the bud listens to the world. The chip generates an inverted copy of that sound and plays it alongside your music so the two cancel.
It works best on steady, low-frequency noise: engine hum, air conditioning, the rumble of a metro carriage. It does much less for sudden sounds like a voice or a horn. ANC changes what you hear. It does nothing for the person on the other end of your call.
Good ANC is quoted in decibels. Around 25dB is respectable at a budget price, 32 to 35dB is strong. A listing that says "ANC" with no number is telling you something by omission.
ENC: environmental noise cancellation
ENC works on the microphone feed. It cleans up your voice so traffic behind you does not drown you out. ENC changes what the caller hears. It does nothing for you.
So which do you need?
- Mostly commuting on a bus or metro, listening to music or podcasts → ANC
- Mostly taking calls outdoors or from a busy office → ENC and microphone count
- Both, which is most people → buy a pair that states both explicitly
Number of microphones is a reasonable proxy for call quality. Four mics with ENC will generally beat two.
One thing worth knowing
ANC costs battery, usually 20 to 30 percent of playtime. If a brand quotes a battery figure without saying whether ANC was on, assume it was off.
JINX Flare and Bliss Buds Pro both carry ANC and ENC, so calls and listening are handled separately rather than one being sold as the other.
By JINX Team