Best Practices for Ceiling Mic Installations

Customers like ceiling microphones for a variety of reasons — no cables on the table, no drilling holes in tables, a more aesthetically pleasing design and freedom to move around the room.

Many technological advancements and improvements in microphone design make it possible for ceiling microphone quality to be as good, if not better, than tabletop mics in many environments.

The ceiling tile surrounding the microphone enhances low-frequency response, making voices sound more natural than tabletop microphones.

Best Practices for Ceiling Microphones Installations

Develop an acoustical model
An acoustical model is based on room dimensions, materials, application, and acoustics.  It will help to determine whether ceiling microphones are appropriate for the room, the number of mics needed, and where they should be placed to deliver the desired coverage.

Figure 1: Room 34’ x 19’  /  Figure 2: Room 23’ x 21’
Even though one room is larger, with a larger table, the rooms require the same number of mics to achieve the desired coverage. If an acoustical model had not been developed, the larger room would have been over miked.


Minimize ceiling noise
HVAC air movement from the ceiling creates noise that is extremely hard to remove from the audio path.  Only the mixers with sophisticated algorithms with individual per-channel processors can reduce the noise without generating audible artifacts.  Because air vents push air down toward the floor, flush-mount ceiling microphones have a natural advantage over hanging mics since they are mounted out of the air path and are not impacted by this type of noise.

Configure microphone settings for best performance
Mics must be configured for the mixer to which they are connected in order to perform as intended.  It is important to consider the mixer input sensitivity, which for most ceiling-installed mics tends to be higher than for tabletop or gooseneck mics.  All professional mixers that support multiple mic types allow the setting of proper mic sensitivity.

Create zones for voice lift
Voice lift is the concept of allowing participants in large rooms to hear each other within the room.  A technique used to accomplish this is to divide a large room into two or more zones for speakers and mics.  The mics in each zone feed the speakers in the other zones, thus minimizing the occurrence of feedback.  Voice lift is often used in rooms where participants may be more than 30 feet apart.

Test system to ensure quality
On completion of installing the equipment, the performance of the system needs to be evaluated.

Hanging microphones were designed to close the talker-to-element distance.  This reduces the pickup pattern area, requiring more mics for a specific room adding complexity and noise into the system.  In addition, that hanging microphones are more sensitive to air motion, which creates white noise in the background.

Consider Flush Ceiling Microphones!!!

Courtesy of CTG Audio

RESIMERCIAL Opportunities

The first part of this year has been dramatic and confused.  We now see that the market is reacting and sales are dramatically improving.

Customers are willing to invest money after the lockdown.  They wish to improve, change or acquire technology.  This is a positive situation in the mid/high end of the AV market (not the same situation in the lower end).  It makes us very optimistic for business in the coming months.

We have the right product mix with the right prices to match customer requirements, face the competition and provide good margins.

Learn more and add value to your product lime!

RESIMERCIAL “Where Residential Meets Commercial” presentations:

  • CTG Audio: Friday August 14 at 11am EST.
  • Lightlink: Wednesday August 19 at 2pm EST.
  • Luxi Electronics: Friday August 21 at 2pm EST.
  • Waterfall Audio: Wednesday August 26 at 11am EST.
  • SIM2: Friday August 28 at 11am EST.

Meet CTG Audio Microphones

CTG Audio manufactures high-performance microphones with a focus on ceiling based systems.

“These flush mounted microphones are unobtrusive (visible portion being smaller than a dime) and cables are hidden.”

CTG Audio systems allow participants to:

  • talk in a very natural tone and volume.
  • move around the room with no compromise in audio quality.
  • contribute without the passing around of a hand-held microphone.
  • identify who is talking at the distant end since the true timbre of the voice is being transmitted.
“The microphones are easily integrated with the current popular IP Video conferencing software such as: Skype, Zoom, Microsoft Team etc.”

CTG Audio systems are typically used for teleconferencing, presentation venues, distance learning, meetings that require recording, classrooms, courtrooms, etc.

“The table microphone can be plugged into a computer sound card to provide wide coverage of conference areas.”

All projector’s light sources have pros and cons

The primary light source technologies used in projectors are:
* Lamp
* Laser
* Laser-Hybrid

lamp is excellent for situations that demand high brightness and more accurate colors.
A lamp has very high luminous efficiency and high light emission.
A lamp is the optimal option to provide an accurate HDR result.
LED (Light Emitting Diodes) provides very good colors, low noise, low power consumption and less heat than other options.
LED is frequently used for portable projectors, even though the LED has limited projection brightness.

laser is the selected choice for large venues without sacrificing brightness, color saturation or image quality.
A laser provides high light output. The light travels in a straight beam with minimum divergence. The impact of the environment is minimal.
A laser offers maintenance free operation, lower heat generation and a non-standard angle mounting ability.
laser-hybrid is a combination of LED and laser technologies.
A laser-hybrid utilizes the advantages of LEDs. It boosts the brightness, but the color quality can be mediocre.
A laser-hybrid is maintenance free.
What is the right choice?
Each light source solution has advantages and disadvantages, depending on the application and the required functionality .
A few questions to consider to avoid buyer’s remorse and to ensure a happy customer:
  • How many hours the projector will be used every week?
  • What is the content that will be mostly displayed (text, images/movies or a mix of both)?
  • What is the required resolution?
  • Where will the projector be mounted? Bear in mind that regardless of which technology is selected, the projector’s filter must be cleaned at least once in a while.
  • How is the ambient lighting?
  • How many lumens should be considered?
  • How large is the projection screen?
  • What screen material will be used or is available?
  • What is the budget? 

Projection Screen Materials: Quick Reference

Several factors can affect the quality of a projected image on a screen:
* the projector
* the screen material
* the ambient light

The light in the room can really ruin the quality of a projected image.
It removes all the fine details.

Every projection screen manufacturer offers multiple finishes.
The right selection depends on various factors.

If the ambient light of the room can be controlled,
white smooth material finish is the preferred choice.
There are several white surfaces available with different gains and coatings.
If the goal is to project 4K images, consider the smother white material available

independent of the gain.The gain is dependent on the light output of the projector.

If the ambient light of the room cannot be controlled,
dark material finish should be considered.
There are multiple dark finishes available. A grey surface could be enough, but in

some cases, there is still too much ambient light,where an ALR (Ambient Light Rejection)
material would be a better option.

If the goal is to hear the sound coming from behind the screen surface,
an acoustically transparent woven material is the way to go.
Other options are perforated and micro perforated materials.
There are white and grey acoustically transparent material options.
The aforementioned criteria for choosing screen color
also applies to acoustically transparent material.

I have heard multiple times,
“I do not need a projection screen, I can project on the wall”
I disagree.
A painted wall will never be as smooth as it needs to be
to get the best projected image possible.

Resimercial where Residential Meets Commercial

The crossover between residential and commercial integrators is growing.

Many integrators have been forced to look into other types of projects.
This trend creates a larger client network,
generates additional opportunities and increases revenue.

This is the moment to explain and educate how products can be used in the two environments.

The residential clients work in offices,
own shops and bars and attend houses of worship.

The commercial clients have a residence.

While the goals are the same, every setting has its own set of requirements.

Integrators need to get educated.


Selling a High-End Product

High-End product is an extreme quality item.

No one likes to pay more when they could pay less, unless the product being offered creates the “WOW” factor and reflects IMPORTANT differentiation.

Customers will provide the information needed for us to close the sale.

Find out your competition.  Ask the customer about what other vendors they are considering.

Get rid of low-quality competitors as quickly as possible.  Convince your customer to eliminate poor quality options.

Check if the customer has experience buying highly priced solutions.  If yes, that is encouraging.  If not, explain the advantages of having a high-quality product.

Ask the customer if they have any stories when low-cost choices have let them down.  If the customer shares a story, use it to reinforce why to purchase high-quality products.  Bear in mind that if the customer is buying on price alone, it will be very difficult to convince otherwise.

Share examples of customers who have regretted buying a less pricey / less quality option.  If you do not have a story do not invent one.  If you have a story, then run with it!

Talk about the product, not all the add-ons you can offer – It is not about you!  The customer wants the best product for their money.

Provide price only after you are in control.  Never offer a discount unless you know for sure that your company is “winning” in the customer’s mind.  Make it clear that price negotiation will only start after the customer is really considering your proposal.

Never feel that you have lost the deal!

The deal is still on until it is off!

From two dimensional Audio to real Surround Sound

Surround sound was limited to a single plane until Dolby Atmos and DTS:X added height, allowing the audience to immerse itself in a more realistic three-dimensional acoustical environment.

Dolby Atmos and DTS:X both can work with lossless high-resolution audio. Their biggest advantage is when used in conjunction with a 7.1 channel system plus in-ceiling speakers. This is referred to as 7.1.2 (two ceiling speakers) or 7.1.4 (four ceiling speakers).

If using two ceiling speakers, the speakers should be placed just slightly ahead of the main listening area with one to the left and one to the right.  If using four ceiling speakers, two speakers should be placed slightly ahead and two speakers placed slightly behind the main listening area, again one speaker from each pair placed to the left and the other to the right.

Waterfall Audio offers the ultimate acoustical and visual solution for all HiFi, audio-video and multiroom project requirements that suit any interior.

Audio is catching up

New audio formats have emerged to compliment the advances in video.

How much do you understand about  “object-based” audio?

The various audio effects exist as objects that are directed to positions around the listener as opposed to specific audio channels.  The surround sound system then maps the positions (coordinates) to the installed speaker configuration.  Dolby Atmos and DTS:X provide “object-based” audio.

A major benefit of object-based systems is providing a vertical aspect to the soundscape rather than just a horizontal plane.  Ceiling speakers produce a significant leap in realism over conventional surround sound.

Waterfall Audio offers the ultimate acoustical and visual solution for all HiFi, audio-video and multiroom project requirements that suit any interior.

BENEFITS of UST projection technology vs flat screen TV

Why Projection Technology?
  • Customizable image size, much larger than any TV.
  • Eliminates that BIG BLACK TV PRESENCE in the room.
  • Uses reflected light that is more pleasant to the eye than the emitted light of a TV.
  • Compact size. Blends with the décor.
  • Portability.
Why UST (Ultra Short Throw) projector?
  • Perfect solution when the room is small or there is no place to install a standard projector.
  • Its wide-angle lens allows it to be placed just under or above the projection screen.
  • No one can stand in the beam of the projected light creating a shadow.
Have you seen the SIM2 UST xTV?
Perfect when…OFF!
Perfect when…ON!
  • Better integration with interiors!
  • Designed to suit any room style!
  • Positioned next to the wall that will receive the image.

SIM2 UST xTV World

xTV: The projector is placed on top of the furniture or on the ceiling.
The elegant crystal glass cabinet blends in with the existing décor.

xTV INV: The projector is easily installed inside the furniture.
The crystal glass surface is flush with the top of the furniture.

xTV Q&EC: The projector is installed in the ceiling.
The crystal glass surface is flush with the ceiling.