Boult Audio Z40 Calling Quality Review: How Good Is the Mic?

When buying TWS earbuds, sound quality and battery life are important, but calling quality can be just as important. Whether you're taking phone calls, attending online meetings or making WhatsApp calls, the microphone needs to capture your voice clearly.

The Boult Audio Z40 comes with a quad-microphone setup and Zen Mode Environmental Noise Cancellation (ENC), which is designed to reduce surrounding noise during calls. The earbuds also offer Bluetooth 5.3 connectivity and support Android and iOS devices.

But how good is the Boult Audio Z40 for calling in everyday situations?

Let's find out.

Boult Audio Z40 Calling Features

The Z40's main calling feature is its quad-mic Zen ENC system.

According to Boult's official product information, the Z40 uses four microphones with environmental noise cancellation to help improve voice clarity during calls.

The earbuds are therefore designed for everyday communication, including:

• Regular phone calls
• WhatsApp calls
• Video calls
• Online meetings
• Online classes
• Voice conversations

The combination of multiple microphones and ENC makes the Z40 more capable for calls than basic TWS earbuds with a simple microphone setup.

Is Boult Audio Z40 Good for Calling?

Yes, the Boult Audio Z40 is suitable for everyday calling, particularly in quieter environments.

Its quad-microphone setup is designed to capture your voice while the Zen ENC system works to reduce environmental noise. Boult specifically lists Zen Mode ENC as one of the Z40's main features.

For calls from home, your room or a relatively quiet office, the Z40 can provide a convenient wireless calling experience.

However, microphone performance can vary depending on the surrounding environment.

Boult Audio Z40 Microphone Quality

The Z40 uses a quad-mic configuration, which is one of its main calling features.

Independent testing has been positive about the ENC system. One review tested the Z40 in environments including a busy market street, a construction area and a coffee shop, reporting that the ENC helped reduce background noise and made the voice clearer to the person on the other end.

This suggests that the Z40 can handle more than just quiet indoor calls.

However, it's important not to expect the microphone to completely remove every background sound.

Boult Z40 Calling in a Quiet Room

A quiet room is the easiest environment for any TWS microphone.

When there is little background noise, the microphones don't have to work as hard to separate your voice from surrounding sounds.

For calls from:

• Home
• Bedroom
• Study room
• Quiet office
• Library
• Hotel room

the Z40 should be a practical option.

This is also where you are most likely to get the clearest voice reproduction.

Boult Z40 Calling in a Noisy Environment

The Zen ENC system is designed specifically to help with environmental noise.

Boult officially describes the Z40 as having Quad Mic Zen Mode Environmental Noise Cancellation.

An independent review found that the system could significantly reduce ambient noise during calls in several noisy locations, although it also noted that it cannot completely eliminate extremely heavy background noise.

This is an important distinction.

ENC can help make your voice easier to hear, but it doesn't mean the person on the other end will hear complete silence behind you.

Boult Z40 Calling Near Traffic

Traffic is one of the more difficult environments for small wireless earbuds.

Cars, horns, engines and people talking nearby can all compete with your voice.

The Z40's ENC can help reduce some of that environmental noise, but results will depend on how loud the surroundings are and how close the noise sources are to you.

For an important phone call, moving to a quieter location will still provide better results.

Boult Z40 Calling in an Office

For normal office calls, the Z40 is a convenient choice.

If you're sitting at a desk with moderate background noise, the quad microphones and ENC can help isolate your voice.

The earbuds are also lightweight and wireless, making them convenient for longer conversations.

For regular work calls, WhatsApp calls and online meetings, the Z40 provides the features you'd expect from an affordable TWS model.

Is Boult Z40 Good for WhatsApp Calls?

Yes.

The Z40 can be used for WhatsApp voice and video calls on compatible smartphones.

Its Bluetooth connection and microphone system make it suitable for everyday conversations.

The overall experience will depend on both the earbuds and your internet/mobile connection, so poor network quality shouldn't automatically be blamed on the earbuds.

Boult Z40 for Online Meetings

The Z40 can also be used for online meetings and classes.

If you're joining meetings from a relatively quiet room, the microphone should be sufficient for normal conversations.

The quad-mic ENC system is designed to reduce environmental noise, which can be useful when there are other sounds around you.

However, if you're attending important professional meetings where microphone clarity is your highest priority, a dedicated headset with a larger microphone may still provide a more consistent result.

Boult Z40 Calling Quality in Real-World Use

Real-world feedback about the Z40's microphone is mixed, which is worth mentioning before buying.

Some users report satisfactory calling performance. For example, a recent Myntra review described the calling quality as fine, while another user specifically praised the ENC during calls.

However, Flipkart reviews also include users who were unhappy with the microphone and said that the other person could not hear them clearly during calls.

This tells us that calling performance can vary between users and environments.

For an affiliate review, this is important: the Z40 should not be presented as having perfect microphone quality in every situation.

Does Boult Z40 Have Noise Cancellation for Calls?

Yes, but it is important to understand the terminology.

The standard Z40 uses Zen Environmental Noise Cancellation, or ENC, rather than traditional ANC for listening. Boult confirms that the Z40 uses a quad-mic ENC system.

ENC vs ANC

ENC:
Primarily helps reduce background noise picked up by the microphones during calls.

ANC:
Primarily reduces surrounding noise that you hear through the earbuds.

Therefore, the Z40's ENC is the feature that matters most when you're talking to someone on a phone call.

Does Boult Z40 Have Four Microphones?

Yes.

Boult's official specifications and FAQ identify the Z40 as having a Quad Mic setup with Zen Mode Quad Mic Environmental Noise Cancellation.

Having multiple microphones gives the earbuds more information to work with when processing your voice and surrounding sound.

However, the number of microphones alone doesn't guarantee perfect call quality.

Microphone positioning, software processing, Bluetooth connection and the surrounding environment all matter.

Boult Z40 Bluetooth Connectivity During Calls

The standard Z40 uses Bluetooth 5.3 and supports common Bluetooth profiles including HFP and HSP, which are relevant to voice communication.

The earbuds are compatible with both Android and iOS devices.

A stable Bluetooth connection is important for calls because interruptions or connection drops can affect the conversation.

For everyday smartphone use, the Z40 provides a modern Bluetooth connection.

Boult Z40 Calling Battery Life

The Z40's large overall battery capacity is another advantage for people who make frequent calls.

Boult advertises up to 60 hours of total playback, while the charging case uses Type-C charging. The company also claims that a 10-minute charge can provide up to 100 minutes of playback.

Actual calling time will generally be different from the manufacturer's maximum playback rating because calls use the microphones and additional processing.

Still, the large battery capacity means you shouldn't need to charge the earbuds frequently during normal use.

Is Boult Z40 Good for Long Calls?

The answer depends on fit and environment.

For everyday conversations, the Z40's compact wireless design makes it convenient for longer calls.

If you're sitting at home or in an office, you can comfortably use the earbuds without holding your phone.

Comfort will naturally vary from person to person because everyone's ears are different.

Boult Z40 Calling Quality: Pros

• Quad microphone setup
• Zen Environmental Noise Cancellation
• Designed for everyday phone calls
• Suitable for WhatsApp calls
• Works with Android and iOS
• Bluetooth 5.3
• Long overall battery life
• Type-C charging
• Fast charging
• Compact wireless design

Boult Z40 Calling Quality: Things to Consider

• Microphone feedback from users is mixed
• Very noisy environments can still affect voice clarity
• ENC does not completely eliminate background noise
• Actual call quality depends on the phone and Bluetooth connection
• Professional users may prefer a dedicated headset

Boult Z40 Calling Quality vs Music Quality

The Z40 is arguably more impressive as an all-round entertainment earbud than as a dedicated calling headset.

It has 10mm Boom X drivers, multiple EQ modes, 60-hour advertised total playback and Adaptive Low Latency for gaming.

This means you can use the same earbuds for:

Music → Gaming → YouTube → Calls → Online meetings

That's one of the main reasons the Z40 can make sense for budget-conscious buyers.

How to Improve Boult Z40 Call Quality

You can improve your calling experience with a few simple steps.

Keep the microphones unobstructed

Make sure the microphone openings aren't covered by dirt or debris.

Use the correct earbud fit

A secure fit can make the earbuds more comfortable and stable during calls.

Keep your phone nearby

Bluetooth performance can be affected by distance and obstacles.

Avoid extremely noisy locations

Even with ENC, heavy traffic and construction noise can affect the conversation.

Keep the earbuds charged

Low battery levels can eventually affect normal operation, so keeping the case charged is useful for frequent callers.

Boult Audio Z40 Calling Quality: Final Verdict

The Boult Audio Z40 offers a useful calling setup for an affordable TWS earbud, thanks to its quad microphones and Zen Environmental Noise Cancellation. Boult officially positions the ENC system as one of the Z40's key features.

Independent testing has found the ENC capable of reducing background noise in several real-world environments, which is encouraging for everyday callers.

At the same time, user feedback isn't completely consistent. Some buyers praise the calling experience, while others report that the microphone doesn't always capture their voice clearly.

Final Verdict: Good for Everyday Calls

If you mainly make calls from home, the office, college or moderately quiet locations, the Boult Audio Z40 is a reasonable option.

Its quad-mic ENC, Bluetooth 5.3 and long battery life give it a solid set of features for everyday communication.

However, if your number-one priority is professional-grade microphone quality in very noisy environments, it would be better to consider a dedicated calling headset or compare the Z40 with newer TWS models.

Overall, the Boult Audio Z40 is a good all-round TWS option for users who want music, gaming and everyday calling in one affordable pair of earbuds.

Check the latest Boult Audio Z40 listing and availability on Flipkart before buying.

Note: Calling performance varies depending on the smartphone, Bluetooth connection, microphone fit, network quality and surrounding noise. The standard Z40 should also not be confused with newer Z40 V2 or Z40 Pro variants, which have different specifications.