Zoom Volume Booster & Audio Enhancer
Zoom's browser client has inferior audio processing compared to the desktop app. Hearably fixes AGC pumping, low volume, and muffled speech — plus Live AI Captions and Noise Reduction for total meeting clarity.
Real-time enhancement via extension · Or upload a file for free in Studio
Zoom has become the default platform for video meetings, online classes, webinars, and remote work. But there's a significant audio quality gap that most users don't realize: the Zoom browser client (Chrome/Edge) delivers noticeably worse audio than the Zoom desktop application. If you've ever joined a Zoom meeting in your browser — because your IT department locked down app installations, you're on a Chromebook, or you simply clicked "Join from Your Browser" — you've experienced the difference.
The most impactful problem is Zoom's Automatic Gain Control (AGC) in the browser. AGC is supposed to keep meeting audio at a consistent volume — if someone speaks quietly, it boosts the signal; if someone speaks loudly, it reduces it. But Chrome's implementation of WebRTC AGC (which Zoom's browser client relies on) is a single-band, full-spectrum processor. This means it treats all frequencies equally. When someone's dog barks in the background, the AGC ducks the entire signal — including the speaker's voice — creating a "pumping" effect where the audio swells and dips unnaturally. Low-frequency noise (air conditioning, traffic) causes the AGC to reduce the overall level, making speech quieter even though the noise is in a completely different frequency range.
The second issue is audio quality and processing capability. The Zoom desktop app uses its own optimized audio engine with proprietary noise suppression, echo cancellation, and audio enhancement algorithms. The browser client must rely on WebRTC's built-in audio processing, which is good but not at the same level. WebRTC's noise suppression can introduce metallic artifacts — a "tinny" or "robotic" quality that becomes noticeable during quiet speech or when someone speaks softly. The browser client also uses lower-complexity codecs: typically Opus at 32-64 kbps for voice (compared to higher complexity profiles in the desktop app), which further reduces quality.
Third, there's a simple volume problem. Many Zoom participants have poorly configured microphones — too far from their mouth, gain set too low, or using a laptop's built-in mic in a noisy room. The desktop app's superior AGC can partially compensate, but the browser client's AGC makes things worse by pumping. The result: some meeting participants are nearly inaudible, and raising your system volume makes the loud participants painful.
Hearably addresses all three problems. The multiband compressor replaces the browser's single-band AGC with intelligent per-band processing — low-frequency noise is compressed independently from speech frequencies, eliminating the pumping effect. The 800% volume boost amplifies quiet speakers to comfortable levels. The Voice Boost mode applies EQ at 1-4 kHz to bring speech forward through the noise and codec artifacts. And the 10-band EQ lets you cut the metallic frequencies (typically 6-8 kHz) where WebRTC noise suppression creates artifacts, while boosting the warmth (200-400 Hz) and clarity (2-4 kHz) of natural speech.
Why Zoom Sounds Worse in the Browser — WebRTC AGC & Single-Band Processing
Zoom's browser client uses WebRTC (Web Real-Time Communication) for audio transport. WebRTC includes a built-in audio processing pipeline: Acoustic Echo Cancellation (AEC), Noise Suppression (NS), and Automatic Gain Control (AGC). While the Zoom desktop app replaces these with its own proprietary algorithms, the browser client is restricted to Chrome's implementation of the WebRTC AudioProcessingModule.
Chrome's AGC operates as a single-band processor — it analyzes the total RMS energy of the incoming signal and applies gain changes to the entire spectrum uniformly. When a low-frequency noise source (HVAC, fan, traffic) raises the total energy, the AGC reduces gain globally, pulling down speech along with the noise. This creates the characteristic "pumping" — the signal ducks when noise appears and recovers slowly, with a release time of approximately 500ms-2s. In meetings where participants have background noise, this pumping is constant and fatiguing.
WebRTC's noise suppression module uses spectral subtraction with Wiener filtering, which estimates the noise floor and subtracts it from the signal. At moderate noise levels, this works well. At higher noise levels or during quiet speech, the algorithm can over-suppress, removing harmonic content from the speaker's voice and introducing "musical noise" artifacts — brief tonal remnants of the noise floor that sound metallic or robotic. The Zoom desktop app mitigates this with multi-stage AI-powered noise suppression; the browser client cannot.
Hearably's multiband compressor is the direct solution. By splitting audio into three bands (low: <250Hz, mid: 250Hz-4kHz, high: >4kHz), it can compress noise-heavy bands independently of speech-heavy bands. Low-frequency noise gets compressed at a higher ratio without affecting mid-range speech clarity. The Voice Boost EQ at 1-4 kHz further separates speech from noise by adding +2-4 dB of targeted gain in the frequency range where speech intelligibility is highest. Together, these replace the browser's blunt single-band AGC with precision per-band processing.
How to get the best audio on Zoom Volume Booster & Audio Enhancer
Fix AGC pumping with the multiband compressor
Chrome's single-band AGC ducks ALL audio when it hears background noise. Hearably's multiband compressor processes low, mid, and high frequencies independently — low-frequency noise (HVAC, fans) is controlled without affecting mid-range speech. The pumping effect is dramatically reduced.
Voice Boost for unclear speakers
Many meeting participants have poor mic setup — too far, too quiet, laptop built-in mic. Voice Boost applies +2-4 dB at 1-4 kHz, bringing speech clarity forward. This is the single most impactful setting for making quiet or muffled Zoom speakers intelligible.
Cut metallic WebRTC noise suppression artifacts
If speech sounds "robotic" or "tinny," WebRTC's noise suppression is over-processing. Use the EQ to cut -2 to -3 dB at 6kHz and 8kHz — these are the frequencies where noise suppression artifacts are most audible. The speech will sound warmer and more natural.
Boost quiet participants without blasting loud ones
Set Hearably to 200-300% boost. The multiband compressor automatically evens out volume differences between loud and quiet participants. The look-ahead limiter prevents sudden loud speakers from causing discomfort.
Night Mode for back-to-back meetings
Meeting fatigue is partly audio fatigue — constant volume adjustments and harsh transients wear you down. Night Mode applies heavy compression that keeps all audio within a narrow, comfortable dynamic range. Everything is audible at a low, sustainable volume.
Reduce echo and room reverb perception
Participants in large rooms often produce echoey audio. While Hearably can't remove echo, cutting 500Hz by -2 dB and 250Hz by -1 dB reduces the boominess of room reflections, and boosting 2-4 kHz brings the direct speech component forward relative to the reverberant field.
Zoom Webinars and large meetings with mixed audio quality
In webinars with dozens of participants, audio quality varies wildly. Hearably normalizes the experience: the compressor handles volume differences, Voice Boost ensures speech clarity regardless of the speaker's mic quality, and the limiter catches any sudden spikes from mic handling or feedback.
Live AI Captions for meeting accessibility
Hearably generates real-time AI captions for any Zoom meeting using Whisper-based transcription running entirely in your browser. No host setup, no Zoom plan upgrade, no data sent to the cloud. Essential for deaf and hard-of-hearing participants, non-native English speakers, and anyone who wants to follow along without missing a word.
Noise Reduction for noisy participants
Zoom's browser client relies on Chrome's WebRTC noise suppression, which introduces metallic artifacts. Hearably's Noise Reduction provides a cleaner alternative — reducing keyboard clicks, fan noise, and background chatter from other participants' feeds without the robotic sound that Chrome's built-in processing creates.
Built for this exact use case
Voice Boost for Speech Clarity
Targeted +2-4 dB EQ at 1-4 kHz brings muffled speech forward. Directly compensates for poor microphones, room acoustics, and WebRTC processing artifacts.
Multiband AGC Replacement
Replace Chrome's single-band AGC (which causes pumping) with Hearably's 3-band compressor. Low-frequency noise is handled independently from speech — no more ducking artifacts.
800% Volume Boost
Quiet Zoom participants become clearly audible. The look-ahead limiter prevents loud participants from causing discomfort — intelligent level management for meetings.
Live AI Captions
Real-time AI-powered captions for any Zoom meeting — no host setup required. Whisper-based transcription runs 100% locally in your browser, so nothing leaves your machine. Essential for accessibility, non-native speakers, and noisy environments.
Choose your method
Different situations call for different tools. Hearably gives you both.
Chrome Extension
Enhance audio live while you stream. The extension intercepts your tab's audio and processes it in real-time — volume boost, EQ, presets — without downloading anything.
- Streaming on Zoom Volume Booster & Audio Enhancer, Netflix, Spotify
- Video calls on Zoom, Meet, Teams
- Any website with audio
- When you want instant, always-on enhancement
Free Online Studio
Upload an audio or video file, apply volume boost + 10-band EQ, preview in real-time, then download the enhanced WAV. Your file never leaves your browser.
- Downloaded videos or music files
- Podcast episodes you want to boost before sharing
- Voice recordings, lectures, interviews
- When you need a permanently enhanced file
Pro tip: Use a YouTube-to-MP3 tool to download the audio, then enhance it in Hearably Studio with EQ + volume boost. Perfect for offline listening, DJ sets, or sharing on social media.
Three clicks to better audio
Install
Add Hearably from the Chrome Web Store. Under 300KB, installs in seconds.
Enhance
Click the Hearably icon and tap "Enhance." Boost kicks in instantly.
Enjoy
Adjust volume, EQ, and presets. Works on any website with audio.
Frequently asked questions
Why does Zoom sound worse in the browser than the desktop app?
The Zoom desktop app uses proprietary audio processing (noise suppression, AGC, echo cancellation). The browser client relies on Chrome's WebRTC audio processing module, which uses a single-band AGC that causes pumping artifacts and simpler noise suppression that can create metallic sounds. The browser client also uses lower-complexity Opus encoding.
What is AGC pumping and how does Hearably fix it?
AGC pumping is when the Automatic Gain Control reduces all audio when it detects background noise — including the speaker's voice. Chrome's AGC is single-band, so any noise affects the entire signal. Hearably's multiband compressor processes frequencies independently, so low-frequency noise is controlled without affecting speech.
Does Hearably process my outgoing audio too?
No. Hearably only processes incoming audio — what you hear from other participants. It captures the tab's audio output and enhances it locally. Your microphone and outgoing audio are completely unaffected.
Can I use Hearably for Zoom meetings on Chromebook?
Yes. Chromebook users are often forced to use the Zoom browser client (no desktop app available). Hearably runs as a Chrome extension and works perfectly on ChromeOS — this is one of its most valuable use cases.
Does Hearably work with screen sharing audio on Zoom?
Yes. When a Zoom participant shares their screen with audio, that audio is mixed into the meeting's audio stream. Hearably processes the entire tab output, so shared screen audio is enhanced along with voice audio.
Will other participants know I'm using Hearably?
No. Hearably processes audio entirely locally in your browser. It does not modify the Zoom session, change any meeting settings, or affect other participants' experience in any way.
How much latency does Hearably add to Zoom calls?
Under 10ms — imperceptible in a meeting context where WebRTC already adds 50-300ms of network latency. Lip sync and conversation flow are completely unaffected.
Should I use Zoom desktop app or browser with Hearably?
If you can install the desktop app, it generally has better native audio processing. But if you're on a Chromebook, a locked-down work computer, or simply prefer the browser, Hearably brings browser Zoom audio quality close to (and in some ways beyond) the desktop app.
Does Hearably provide live captions for Zoom meetings?
Yes. Hearably's Live AI Captions generate real-time transcription for any Zoom meeting using Whisper-based AI running 100% locally in your browser. No host setup required, no Zoom plan upgrade needed, and no audio data is sent to any server. This is a game-changer for accessibility, non-native speakers, and anyone who wants a searchable record of what was said.
Does Hearably have noise reduction for Zoom?
Yes. Hearably's Noise Reduction cleans up background noise from other participants — keyboard clicks, fans, barking dogs, construction — without the metallic artifacts that Chrome's built-in WebRTC noise suppression introduces. The processing runs locally and only affects what you hear, not your outgoing audio.