Your S$50,000 Meeting Room Still Sounds Terrible. Here's Why.

Most meeting room audio problems are not caused by cheap equipment; they come from a hard, echoey room, a noisy air-conditioning system and microphones placed too far from the people talking. The fix is usually acoustic treatment plus the right microphone layout: a video bar such as the Yealink MeetingBar A40 or A50 with expansion microphones, a ceiling array such as the Yealink CM20, a Logitech Rally Mic Pod for a Rally system, or a Yealink CP965 conference phone with wireless microphones for an audio-first room. The "S$50,000" in our headline is a rhetorical example, not a real project: a big budget spent on displays and a 4K camera still produces a room the far end struggles to hear if nobody designed the audio.

Why does a new meeting room sound like a bathroom on calls?

Each row is a design decision, not a product defect, and the logic applies to any brand. Use our meeting room configurator to map a room before buying.

What is reverberation and how much is too much?

Reverberation time, written RT60, is the time it takes a sound to decay by 60 dB after the source stops. In a room with glass on two or three sides, a hard ceiling and a laminate table, speech keeps bouncing long after each word, and a microphone hears the reflection almost as loudly as the voice. There is no single Microsoft or ANSI target for corporate meeting rooms, but the closest published benchmark is the ANSI/ASA S12.60 classroom standard, which caps RT60 at 0.6 seconds for unoccupied rooms under 10,000 cubic feet (about 283 m³) and background noise at 35 dBA. A 2023 Institute of Acoustics paper on video conferencing in corporate meeting rooms found that rooms with hard walls and absorption only on the ceiling let horizontal reverberation dominate, producing flutter echoes and audible colouration at the far end, and listed interior design trends towards hard surfaces and "as much glazing as possible" as contributing factors.

Do glass walls ruin meeting room audio?

Glass does not ruin a room, but it removes the absorption that plasterboard and fabric used to provide. Yealink's own audio design guidance for Teams rooms says that large glass surfaces and hard materials increase reverberation and recommends treating the room to reduce reflections before they reach the microphone. Practical fixes: acoustic panels on the one solid wall, a rug under the table, fabric chairs, soft ceiling tiles and blinds on the glass facing the table. Device processing helps after that: the MeetingBar A40 and A50 both list reverberation suppression and noise cancellation in their audio features. Processing cannot rebuild speech that the room has already smeared, so treat the room first and let the device handle what is left.

How far can a video bar microphone really hear?

Every bar publishes a pickup figure, and it is measured from the bar, not the middle of the table. Yealink rates the MeetingBar A40 at 6 m full-duplex voice pickup with eight MEMS microphones and the MeetingBar A50 at up to 10 m. The mistake is choosing by seat count and ignoring the distance to the farthest chair, who then sounds quieter and more reverberant than everyone else. The fix is expansion microphones placed on the table near the far seats. The A40 accepts two VCM35 or VCM36-W microphones, or two CM20 or CM50 ceiling microphones, and the A50 supports the VCM35, VCM36 and CM20. In a Logitech Rally system the Rally Mic Pod at S$570.38 does the same job; Logitech says the pods can be daisy-chained for long tables, and they work with Rally Bar Mini, Rally Bar and Rally. Poly Studio X50 rooms use the Poly Studio expansion microphone (price on request; quoted per room configuration). Our Yealink vs Poly vs Jabra video bar comparison compares the bars across brands.

Ceiling, table or bar microphones: which is right?

Bar microphones suit huddle and small rooms where everyone sits within the rated distance. Table microphones extend coverage cheaply but collect paper noise and cables. Ceiling arrays keep the table clear and cover a defined area: Yealink's CM20 datasheet specifies 16 microphones in eight pickup zones, coverage of up to 60 m² with 30 m² of full-duplex capture, and power and audio over a single PoE cable. At S$1,125.00 the Yealink CM20 suits medium rooms on a Yealink MVC or MeetingBar system, and the Yealink CM50 Dante ceiling microphone at S$3,855.00 is for larger rooms with a DSP. For a Shure-based design, the Shure Stem Ceiling microphone array is listed at S$4,629.00 and is available to order. Ceiling zones must be tuned on site; incorrect beamformed-microphone setup is one of the causes the Institute of Acoustics paper lists for reverberant, coloured sound. The full Yealink range is in the Yealink microphones and audio collection.

Why do remote people hear their own voice echo back?

Acoustic echo cancellation (AEC) stops the remote participant's voice, played through the room speakers, from being picked up by the room microphones and sent back to them. It works when the microphone and the speaker are part of the same system so the processor knows exactly what it played. The classic mistake is a consumer Bluetooth speaker paired with a separate USB microphone. Microsoft's certification programme for Teams peripherals tests audio devices for wide-band audio with no echo or distortion, and tests shared devices against defined room sizes and noise environments, which is a good reason to buy certified room audio rather than assembling consumer parts. For audio-only rooms, the Yealink CP965 Teams conference phone at S$899.10 is a full-duplex speakerphone with AEC and a 6 m pickup range, and the CP965 Wireless Mic Teams bundle at S$1,229.85 adds wireless microphones for longer tables. Our CP925 vs CP935W vs CP965 guide covers which conference phone suits which table.

Aircon noise, projectors and the other noise you stop noticing

Yealink lists air-conditioning, chair movement, typing, doors and conversation outside as the common noise sources in meeting rooms, and the Institute of Acoustics paper attributes high background noise in its case-study rooms to the air-handling system. In Singapore the diffuser directly above the table is a frequent culprit. Ask facilities whether the airflow can be reduced or redirected, keep ceiling microphones away from diffusers, and switch off projector fans and the room PC's speakers if they are not in use. The less noise the suppression has to remove, the more natural voices sound.

A checklist before you spend more on hardware

For example, in a problem room: compare the farthest chair's distance with the bar's rated pickup, clap once and listen for a ringing tail, listen under the air-conditioning outlet, and check that speakers and microphones belong to one system. Fix any failure before upgrading the camera. Other posts in this series cover the rest of the room: 5 meeting room mistakes that make your company look unprofessional, why personal webcams fail in meeting rooms, why your meeting room needs planning before gadgets and the S$500 vs S$5,000 setup compared. For matching a system to room size, see the best video conferencing system by room size.

Fixing meeting room audio in Singapore

SourceIT supplies video bars, conference phones and microphones from Yealink, Logitech, Poly, Jabra and Shure in Singapore, and can survey a room before quoting. Send us the room dimensions, seat count, table shape, wall materials and air-conditioning outlet positions; room design and installation are available. Manufacturer warranty applies; confirm the term for your SKU when requesting a quote. Use Request for Quotation on the product page, call (65) 6978 3502, email Sales@sourceit.com.sg or use our contact page. Government and education buyers can procure through GeBIZ and Vendors@Gov, where we are registered. Browse room systems in the medium room video conferencing collection.

Frequently asked questions

What reverberation time should a meeting room have? There is no single standard for corporate meeting rooms; the ANSI/ASA S12.60 classroom limit of 0.6 seconds for rooms under about 283 m³ is a widely used reference for speech rooms.

Will a more expensive video bar fix echo? Not on its own. Reverberation suppression helps, but a highly reflective room needs absorption first, and a far seat needs a closer microphone.

When should I add an expansion microphone? When the farthest seat is beyond the bar's rated pickup, for example beyond 6 m for a MeetingBar A40, or when the table is long or split.

Why does the far end hear their own voice? The room's microphones are picking up its speakers without echo cancellation, usually because the microphone and speaker are separate, unmatched devices.