Guide · Sound Busy
Background noise for calls, done right.
Updated · BusyAudio
A little background sound changes how a call feels. A café hum makes a catch-up feel relaxed; an office buzz makes “let me check and come back to you” sound perfectly normal. The trick is making it sound like a room, not like a sound effect.
Here’s how to set it up on a phone or laptop, which sounds carry well over a call, and a few honest-use rules.
Setup: one device for the call, one for the sound
The cleanest setup is two devices: take the call on your phone and play BusyAudio from a laptop or tablet nearby (or the other way around). Phone microphones are designed to suppress steady noise, so the sound needs to be in the room, not piped directly into the call.
- Put the speaker about an arm’s length from the microphone, slightly behind it.
- Start low. If you can clearly hear it yourself, it’s probably too loud for the other person.
- Use the per-sound sliders to keep the “bed” (office, café, street) low and any one-off sound (doorbell, call waiting) a bit higher.
- On a laptop video call, turn off “noise suppression: high” if the sound keeps disappearing, or accept that a lighter version gets through.
Sounds that carry well over a call
Calls squeeze audio into a narrow band, so busy, mid-range sounds survive best: chatter, footsteps, keyboards, traffic. Deep rumbles and very high hiss mostly get filtered out.
- Busy Office and Meeting Starting: voices and chairs come through clearly.
- Coffee Shop: cups and murmur, very natural on a casual call.
- Traffic & Street or Driving: classic “I’m out and about.”
- Call Waiting: a polite double beep that cuts through any background.
- Bad Signal: already band-limited like a phone line, so it’s the most convincing of all. Use it sparingly and with a smile.
Layering: the realism trick
Real rooms are never one sound. Layer a quiet bed (office, café or street) with one small detail (typing, a doorbell, a beep). BusyAudio’s Now Playing mixer lets you add, remove and balance sounds without stopping playback, and you can save a mix you like for next time.
Ready-made combos like “They’re starting!”, “Another call, gotta go” and “Driving, can’t talk” are a one-tap shortcut.
Honest-use rules
Background sound is a mood-setter, not a cover story. Use it to make a true reason feel natural, add ambience to a podcast or video, or just make your home office feel less lonely. Don’t use it to mislead anyone about safety, money, work you haven’t done, or anything else that matters.
Questions
Can I add background noise to a phone call?
Yes. Play the sound from a second device near your phone’s microphone at a low volume. Mid-range sounds such as office chatter, a café or traffic carry best.
Why does background noise disappear on video calls?
Apps like Zoom, Teams and Meet suppress steady noise. Lower the app’s noise suppression level, or use sounds with more variation, like chatter or typing.
Is it free?
Yes. BusyAudio is free in the browser with no account, and every sound is CC0 public domain.