Which of the following receiver filter bandwidths provides the best signal-to-noise ratio for SSB reception?

To achieve the best signal-to-noise ratio, a receiver's filter bandwidth should perfectly match the bandwidth of the transmitted signal. For a Single Sideband (SSB) voice signal, the standard bandwidth required for clear, intelligible human speech is approximately 2400 Hz (or 2.4 kHz). If the filter is set too narrow, such as 500 Hz or 1000 Hz, the voice will sound muffled and distorted because essential audio frequencies are blocked. 500 Hz is typically used for CW (Morse code) reception, not voice. Conversely, if the filter is set too wide, like 5000 Hz, it will let in excess background noise and adjacent signals without improving the voice quality. This extra noise degrades the signal-to-noise ratio, making it harder to hear the desired station.