hum and noise造句

• A broad black band was applied to some tubular paper capacitors to indicate the end that had the outer electrode; this allowed this end to be connected to chassis ground to provide some shielding against hum and noise pickup.
• In addition to band-stop filters ( also known as " notch filters " ), low-pass filters, and high-pass filters for filtering out hum and noise, many applications allow the user to take a " noiseprint " of a small section of waveform when the stylus is tracking but no music is playing; the filtering is then accomplished specific to this noiseprint.