The best replacement for boom mic is shotgun mic.

The best alternatives to boom mic are rated as following:
★★★★★  shotgun mic
★  inline mic

Your alternative for boom mic is not listed? Suggest!
Speaking about boom mic, one probably shouldn't forget about headset.

Other search terms related to boom mic and their ratings are:
★★★★★ headset
You have in mind a companion for boom mic and it is not yet here? Propose!



Google Trends

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boom mic
shotgun mic
inline mic