Does it work for live webinars?
Yes, if you watch the webinar in a browser tab. The extension raises the volume of the media playing in the tab. It cannot change the sound of a separate desktop app.
Quiet Online Lectures? How to Boost Lecture and Webinar Audio
The lecturer is far from the microphone, the room echoes, and you are leaning toward the screen with the volume at maximum. Quiet lectures are tiring: you spend your attention on hearing the words instead of understanding them. The good news is that a quiet lecture is one of the easiest problems to fix.
Why online lectures are so quiet
- The microphone is far away. A laptop microphone at the back of a lecture hall, or a lecturer who walks away from the mic, records a weak signal.
- Low input gain. Many webinar and meeting tools record at a conservative level and rely on you to turn up the volume.
- Room sound. Echo and background noise fill the recording, so the voice sits low in the mix.
- Compression on the platform. Recorded meetings and course platforms often compress the audio to keep files small, which flattens the level.
Because a lecture is mostly one voice, a simple boost works very well here. The voice is the main thing in the recording, so raising the whole signal raises what you want to hear.
Quick checklist before you start
Before the lecture begins
- Use headphones. They make speech much clearer than laptop speakers.
- Check the player volume and the system volume first. Then use the boost for the rest.
- Test the level while the lecturer is speaking, not during the silence before the start.
- Have your own recording or a file you may keep ready if you plan to process it afterwards.
Two ways to boost a lecture
In your browser
A live or streamed lecture in Chrome
Install the Sound Booster extension and raise the volume of the tab while the lecture plays. It works for webinars, course videos and web lecture players.
Install Sound BoosterOn your files
A lecture recording you have as a file
Open the recording in the Sound Booster website, normalize it, and download a louder copy that you can play on any device.
Open Volume BoosterThe best workflow for a recorded lecture
- Open the recording in the Volume Booster and choose Normalize. It raises the file to a safe maximum without you guessing the number.
- Preview a quiet stretch. If it is still too soft, switch to Boost and add a few dB.
- Turn on Soft clip if there are sudden loud moments such as applause or a question from the room.
- Download the louder version and keep it with your notes. You only need to do this once per recording.
Only process recordings that you are allowed to keep, such as your own recordings of a session or files provided by your school or course.
Study tips that go with a louder lecture
- Watch the noise. A boost also raises hiss and room noise. Keep the level moderate and use headphones, which make speech clearer than laptop speakers.
- Save time with speed. Once the voice is comfortable, the Speed Changer lets you play it a bit faster. Many people follow a lecture comfortably at 1.25 times.
- Cut the dead time. The Audio Trimmer removes silence, waiting time and chatter before and after the lecture.
- Help the voice stand out. If the room echo makes the voice muddy, the Equalizer can lift the speech range a little.
If you record lectures yourself
A lecture that you record yourself is the easiest case, because you can prevent the problem. A few habits make a big difference:
- Put the microphone or the device as close to the speaker as you can. Distance is the biggest cause of weak recordings.
- Record in a quiet room and away from fans, projectors and keyboards.
- Record a short test and listen to it before the lecture starts.
- Afterwards, normalize the file once in the Volume Booster and keep the louder version.
When boosting is not enough
If you cannot understand the lecturer even at a high level, the original recording is too weak or too noisy for a volume tool to rescue. A boost cannot add detail that was never recorded. In that case, ask the lecturer or the organizer for a better recording, or for the slides and notes as a backup.
Frequently asked questions
Will boosting make the background noise louder?
Yes, a boost raises everything in the recording, including noise. Keep the level moderate, use headphones, and avoid pushing the boost further than you need.
Can I make a downloaded lecture louder for all my devices?
Yes. Open the recording in the Sound Booster website, normalize or boost it, and download the louder file. It will be louder wherever you play it.
Is my recording uploaded anywhere?
No. The website processes the file inside your browser tab, and nothing is sent to a server.
Try it now
Install the extension for sound in your browser tabs, or open the Volume Booster to make a file louder. Both work without an account, and files are processed in your browser.