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Nobody enjoys hearing their own voice repeated back half a second later, or trying to follow a colleague who sounds like they are speaking from inside a washing machine. Echo and background noise are the two most common audio complaints on calls, and unlike many tech problems, they usually have nothing to do with a faulty microphone. They come from what the microphone is picking up: your speakers, your room, your keyboard, the fan in your laptop, or the traffic outside.

This guide explains the difference between echo, noise and distortion, and gives you practical fixes for each. Most of them cost nothing, and several can be done in under a minute.

Open our microphone test, speak normally for ten seconds, and play the recording back. This is the single most useful thing you can do, because you hear exactly what others hear before any call processing. Listen for hiss, hum, room echo, keyboard clatter and whether your voice sounds distant or muffled. The live level meter also shows if your input is too quiet or clipping.

• Hollow, roomy sound: your room is reflecting sound, or you are too far from the mic.
• Constant hiss: input gain is too high, or the microphone is low quality.
• Low hum or buzz: electrical interference, often from a ground loop or a charger.
• Crackling or distortion: input level too high, a loose connection, or a failing mic.

True echo on a call, where people hear their own voice coming back, almost always means that someone's microphone is picking up their speakers. When they talk, your voice plays from your speakers, your microphone hears it and sends it back to them. The person hearing the echo is usually not the one causing it. If other people hear their own voice, the problem is likely on your end, and vice versa.

The simplest cure is headphones. When sound goes into your ears instead of into the room, the microphone cannot hear it. Even basic wired earbuds eliminate echo completely. If you prefer speakers, lower their volume and keep them away from the microphone.

Room echo, often called reverb, is different from call echo. It makes you sound as if you are in a bathroom or an empty office. Hard surfaces like bare walls, glass and wooden floors reflect sound. Soft materials absorb it.

You do not need acoustic panels to improve things. Rugs, curtains, bookshelves, sofas and even a duvet hung behind your screen can make a noticeable difference. Sitting closer to the microphone matters even more. Moving from an arm's length away to a hand's width away can transform the sound, because your voice becomes much louder than the reflections.

• Sit closer to the microphone and speak towards it.
• Add soft furnishings, especially behind and beside you.
• Avoid taking calls in kitchens, bathrooms and empty rooms.
• Close doors to reduce reflections from hallways.

Most modern meeting apps have noise suppression. In Zoom, look under Settings, Audio, Background noise suppression, and choose a higher level if you are in a noisy place. In Microsoft Teams, it is under Settings, Devices, Noise suppression. Google Meet has a noise cancellation option in its audio settings on supported accounts. Windows 11 and macOS also offer voice isolation or noise reduction features for some devices.

Noise suppression is great for fans, typing and traffic, but it has limits. It can make your voice sound slightly processed, and it may cut off the start of words at very high settings. Try different levels and use the microphone test to compare.

Input level, or gain, is how much the system amplifies your microphone. Too low and you sound quiet and thin, too high and you get hiss, distortion and more background noise. On Windows, go to Settings, System, Sound, choose your input device, and adjust the input volume. On a Mac, System Settings, Sound, Input.

Speak at a normal volume and watch the level meter in our microphone test. Aim for the level to reach roughly two thirds of the way on your loudest words without hitting the top. Many meeting apps also adjust the level automatically; if your volume keeps rising and falling, try turning automatic adjustment off and set it manually.

A steady low hum is often electrical. It can come from a ground loop when a computer and speakers are plugged into different outlets, or from a nearby charger, monitor power supply or fluorescent light. Try unplugging the laptop charger for a moment. If the hum disappears, a ground loop is likely. Using the same power strip for all devices, or a USB microphone instead of an analogue one, often fixes it.

Crackling usually means a poor connection. Check the cable, try another port, and for 3.5 millimetre jacks, make sure the plug is fully inserted and the port is clean. For Bluetooth headsets, crackling during calls can come from the low quality hands-free profile or interference; moving closer to the computer or using a wired headset helps.

If you have fixed the room and settings and still want better sound, the next step is equipment. A good USB headset with a boom microphone gives the best balance of clarity and noise rejection for most people, because the mic sits close to your mouth. Desktop USB microphones can sound excellent but pick up more of the room. Look for microphones with a cardioid pattern, which focuses on sound from the front.

Bluetooth headsets are convenient but often sound worse on calls than when playing music, because the microphone uses a more limited profile. For regular long calls, wired or dedicated wireless USB dongle headsets tend to be more reliable.

1. Record yourself in the microphone test and listen back.
2. Wear headphones to eliminate call echo.
3. Move closer to the microphone and soften the room.
4. Turn on noise suppression at a suitable level.
5. Set the input level so peaks stay below the top of the meter.
6. Check cables and chargers if you hear hum or crackle.

Record again after each change. Hearing the before and after is the fastest way to learn what works in your space, and you only need to do it once to set up a great sounding call environment.

Meeting rooms with several people bring their own challenges. If two laptops in the same room both join a call with microphones and speakers active, they create loud feedback and echo almost immediately. Only one device in a room should have audio enabled; everyone else should join muted with speakers off, or use a dedicated room speakerphone.

A good conference speakerphone combines a microphone array with a speaker and built-in echo cancellation tuned for that specific hardware. For small teams sharing a room regularly, it is one of the most effective upgrades available, and much cheaper than full meeting room systems.

At home, be aware of smart speakers and other devices that may play sound during calls. Notification sounds from a second computer or a tablet can also be picked up. Silencing nearby devices before an important call is a simple habit that keeps your audio clean and professional.

Phones are designed to handle calls well, but video meeting apps on phones can still produce echo when used on speaker in a quiet, hard room. Holding the phone closer, using wired earbuds, or switching to a Bluetooth headset solves most problems. Cases that cover the microphone openings are a common hidden cause of muffled audio, so check that the small holes at the bottom and top of the phone are not blocked by the case or by lint.

Tablets placed flat on a table often pick up table vibrations and sound distant. A simple stand that angles the tablet towards you improves both the camera view and the microphone pickup. As always, a quick recording in our microphone test shows you exactly how you sound before you join.