
bemerkbar
noticeable
In such a way that something can be perceived, seen, heard, or felt; noticeable or recognizable.
Ein leichter Temperaturanstieg war bereits deutlich bemerkbar.
A slight rise in temperature was already clearly noticeable.
noticeable
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noticeable
In such a way that something can be perceived, seen, heard, or felt; noticeable or recognizable.
Ein leichter Temperaturanstieg war bereits deutlich bemerkbar.
A slight rise in temperature was already clearly noticeable.

to become noticeable
To draw attention to oneself or become noticeable. This can refer to people, but also to symptoms or effects.
Die Müdigkeit nach der langen Reise machte sich langsam bemerkbar.
The tiredness after the long journey slowly became noticeable.
The word is made up of the verb 'bemerken' (to notice) and the ending '-bar' (-able). The ending '-bar' means that something is possible. So 'bemerkbar' literally means 'bemerk-bar' (notice-able) or 'wahrnehmbar' (perceptible).
Der Unterschied zwischen den beiden Versionen ist kaum bemerkbar.
The difference between the two versions is hardly noticeable.
The expression 'sich bemerkbar machen' (to make oneself noticed / to become noticeable) is reflexive. The reflexive pronoun 'sich' must be adapted to the subject. It means that something becomes noticeable or recognizable.
Ich mache mich durch Husten bemerkbar, wenn ich ins Zimmer komme.
I make myself noticed by coughing when I come into the room.
The adjective 'bemerkbar' (noticeable) is almost always used predicatively, that is, together with verbs like 'sein' (to be) or 'werden' (to become). Using it directly before a noun (attributively) is rare.
Die Verbesserung seiner Deutschkenntnisse ist deutlich bemerkbar.
The improvement in his German skills is clearly noticeable.
Abstract things often 'machen sich bemerkbar' (become noticeable). These include symptoms (e.g., tiredness, pain), effects (e.g., climate change), or changes (e.g., technological progress).
Nach dem langen Spaziergang machte sich der Hunger bemerkbar.
After the long walk, hunger became noticeable.
recognizable
Erkennbar and bemerkbar both describe something that can be perceived. Erkennbar emphasizes that something can be identified as a particular pattern or characteristic. Bemerkbar mainly says that a phenomenon or change is noticeable, without necessarily having to be identified precisely yet.

In den Messdaten ist eine leichte Veränderung bemerkbar.
A slight change can be noticed in the measurement data.
In den Messdaten ist ein regelmäßig wiederkehrendes Muster erkennbar.
A regularly recurring pattern can be recognized in the measurement data.