What could be used in place of a regular speaker to help you copy signals in a noisy area?

Using a set of headphones in a noisy area is a practical solution for improving the clarity of incoming signals. Headphones provide a more direct audio experience, minimizing external sounds that could interfere with your ability to hear faint signals. By isolating the sound, they allow for better signal identification and a clearer understanding of the transmitted message, which is particularly beneficial in environments with high ambient noise.

In contrast, a regular speaker would project sound into the room, making it difficult to discern signals amidst the surrounding noise. A video display is not relevant for audio reception and would not help in copying signals, while a low-pass filter is designed to attenuate high frequencies rather than directly assist in audio clarity. A boom microphone, although useful for enhancing voice communication, does not aid in listening to received signals directly. Thus, headphones offer the best solution for focused listening in challenging acoustic environments.