Learn about headphones (part 2) - Công ty TNHH ĐỈNH QUANG (DQN Co., Ltd.)

The 3.5mm mini jack is also known as the "headphone jack". Basically, this is the most widely used way to connect music devices to the audio output. It is found mostly on portable headsets, laptops, MP3 players, radios, tablets, smartphones and other audio devices. Morover, 3.5mm jack type is quite flexible, users can listen to music and use headphones for calls.

PROS

Easy to connnect
High availability
Good electrical insulation

CONS

No locking mechanism
Easily damaged, broken

6.5mm-jack compatible headphones

The standard 6.5mm jack connector is slightly larger and is mainly found on Hi-Fidelity headphones and professional headsets; 6.5mm jack can connect to 3.5mm better amplifier and audio system; In addition, gold plated for better electrical conductivity and avoid oxidation.

Type-C jack compatible headphones

USB Type-C jack was born to fill the void left by headsets using a dedicated jack after smartphone lines were ditching their traditional headphone jack. Even so, it is extremely scarce and expensive. The USB Type C jack is not very popular so it causes compatibility issues not only port compatibility but also wire compatibility and sometimes it only allows charging but not data transfer. In addition, standards and specifications may vary.

PROS

Good sound quality
Good sound transmission and noise insulation

CONS

Problems with compatibility
Vulnerable to phase shake
Expensive price

Type-A jack compatible headphones

USB Type-A headset for computer users. Beside that, office headsets for VOIP primarily use USB to connect to computers, allowing them to have only one connector for audio and microphone.

Wireless Headphones

Bluetooth headphone

Bluetooth headsets appeared a few years ago and are now widely used. The range of a Bluetooth headset is usually 10-15 meters. On-Ear, Over-Ear, and In-Ear headsets can all use Bluetooth; Basically they are often bulkier and heavier than traditional wired headsets with built-in batteries and electronics. However, these disadvantages are solved quite well on high-quality Bluetooth headsets thanks to current technology.

PROS

Easy to carry and store
Easy to connect
Less power consumption
Less interference

CONS

There is a lag in the connection.
Limited in scope
Poor battery life

True Wireless Stereo

The TWS headphones are completely wireless with no connection of any kind between the two headphones. Basically, it uses Bluetooth technology. Each headset is equipped with Bluetooth, battery and amplifier, and more. Single device connects to the source device individually. In addition, it delivers excellent sound quality with noise cancellation.

PROS

Fashionable
Convenient, compact
Easy to carry

CONS

Short battery life
Easy to fall, lose (due to small size)
The connection is occasionally disrupted.
Sound quality is worse than wired device
The control buttons are a little tricky to use.
High price

Neckband Headphones

Initially, neckband design, also known as neckband headphones. As a matter of fact, this is a type of headset that easily hugs the user's collar or neck. Similarly, it uses Bluetooth technology to connect to a smartphone or laptop. Obviously, with these headphones, users don't have to worry about wires or the device it's connected to. Besides, they can easily move around without fear of entangled wires. The controls are conveniently placed and for taking calls or listening to some sounds. It has good battery life, which lasts about 12 hours. In addition to offering a stylish look, its noise-cancelling feature delivers excellent sound quality even in crowded places.

PROS

Simple and convenient
Good battery life
Stylish, trendy
Fairly light weight
The extension cord helps to prevent the device from being dropped/lost

CONS

Sound quality is not good
Small operating range

Ultra High Frequency (UHF) Headphones

Generally, UHF transmit signals over the air through their own transmitters. Basically, this technology is mainly used in Hi-Fidelity headphones. UHF models use two frequency bands to transmit signals: 863-865 MHz or 2.4 GHz. Especially, the usable range is further than that of Bluetooth headphones, up to 91 meters, but at the same time bulkier and heavier. In addition, UHF technology delivers rich surround sound.

PROS

Free broadcast (not blocked by walls)
Broadcast far and wide
Easy setup

cons

Big and heavy
Limited design choices

Headphones Infrared

Infrared transmit data over infrared wavelengths. Generally, this is short- and medium-range wireless technology, also known as Line of Sight/LOS technology. Basically, it means that the user needs to be within range of the transmitter to receive audio. Especially, that offers more privacy because it creates a single connection, no worries about anyone tuning into the same band on their wireless headphones. Therefore, it suitable for people who like to watch TV or listen to music wirelessly. Morover, infrared headphones have an effective range of about 10 meters or less and are known for their ability to produce high-quality sound. Battery life up to 20 hours.

PROS

Standalone use device
Excellent sound quality
Privacy

CONS

Line of sight must be clear of obstructions
Small operating range

2-in-1

Generally, 2-in-1 headphones are headphones that offer both types of connectivity, both wired and wireless. As for the wired connection, they can connect to compatible devices not only via the 3.5mm jack but also via Bluetooth for wireless. Specifically, this type of headset has a detachable 3.5mm cable. Therefore, it offers the convenience of a wireless headset and the sound quality of a wired headset. Morover, users don't need to worry about their battery running out.

Earphone comparison

Headphones	Size	Level of comfort	Sound quality	Price
In-Ear	Small	Medium	Low	Low
Earbuds	Small	Medium	Medium	Affordable
On-ear	Medium	Low	Medium	Affordable
Over-ear	Large	Medium	High	High
Open-Ear	Small	Medium	Low	High
Closed-back	Medium	Low	Medium	Low
Open-Back	Medium	Medium	Good	Low
Noise-Cancelling	Diversity	High	High	High
Noise-Isolating	Large	High	High	High

Application: PBX headset

Referring to headphones, we all immediately think of personal headsets for phones or computers, a tool for interesting personal communication or entertainment. However, switchboard headsets are a completely different segment.

PBX headsets or have other professional names such as Call center headsets or Telesale headsets - these are:

First: A line of dedicated headphones
Second: Ideal and professional solution for agents who are employees in the online sales, consulting, and customer care industries.
Third: Headset line to be used with VoIP devices (such as IP phones, softphones, PC computers)
Fourth: Compact design, focusing on voice for listening / calling, noise cancellation and the ability to adjust the belt, microphone
Fifth: The device helps employees to be more comfortable with prolonged calls, reduces fatigue, reduces the impact of general noise, thereby improving work productivity.

With call centers, switchboard headsets are one of the devices that always need a large quantity to equip employees, as a result finding cheap and good quality products is always a concern of many people enterprise.

Classification and characteristics of PBX headsets

Mono Headset

Duo Headset

Sound quality: Duo headphones are better than Mono headphones. However, using Duo headphones for a long time is easier to cause headaches than Mono headphones.
Popular designs:
First, design based on On-Ear headphones
Sencond, built-in with 330-degree adjustable microphone
Size: compact
Earcups: Closed-Back and Noise-Isolating earcups are widely used in switchboard headsets. Especially, with high-end switchboard headsets, Noise-Cancelling earcups are commonly applied.
Connection ports: PBX headsets usually have three main types of ports
Straight jack (3.5mm): connect to a traditional desk phone
RJ9 jack: connect to IP phone
USB jack: connect to PC or laptop

Advantages and disadvantages of PBX headsets

ADVANTAGES

Good quality sound
The HD (High Definition) sound quality of a PBX headset will improve your interactions with customers and partners, at the same time eliminating the hassle of having to decode obscured or unclear audio.
The ability to filter noise
The PBX headset is integrated with modern technology capable of reducing or eliminating noise even in a noisy working environment, the optimally positioned headset microphone helps exchange information clearly, as a result making increase customer satisfaction.
Free your hands
When using the headset, we will not need to use our hands because it is always fixed. From that, this helps to understand productivity faster, more comfortably and professionally.

DISADVANATAGES

Calls cannot be made right on the headset, but must use a supporting dialer (Softphone, IP phone)
Conventional switchboard headsets will be limited by the built-in buttons to turn off calls. However, some PBX headsets like the DQN HU810 have a built-in quick answer button on the control bar, quickly launching MS Teams and navigating to the call to help overcome this limitation.
Call quality depends directly on the connected device or software
If the USB headset has a digital audio signal processor (DSP) and good noise cancellation like the DQN HU810 Call center headset, the problem of depending on the connected device or the software becomes less or less important.
No ringing or very low tone when there is an incoming call
Currently, the latest line of headphones are improving this situation, therefore we will own the best quality headphones.

Part 1

Tin tức

DQN participate the seminar “Digital transformation: Opportunities and challenges”

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