Sennheiser ACCENTUM User manual

ACCENTUM
Wireless around-ear headphones
Model: ACAEBT
Instruction manual
Use the search function, the navigation (left) or the following links:
Start
“Product overview”
“Getting started”
“Using the headphones”
“FAQ/If a problem occurs ...”
“Specifications”
Sonova Consumer Hearing GmbH
Am Labor 1
30900 Wedemark
Germany
www.sennheiser-hearing.com
Version: 10/23 A01

Important safety instructions
2 | ACCENTUM
Important safety instructions
▷Read this instruction manual carefully and completely before
using the product.
▷Always include this instruction manual when passing the product
on to third parties.
▷Do not use the product if it is obviously defective or makes loud,
unusual (whistling or beeping) noise.
▷Only use the product in environments where Bluetooth wireless
transmission is permitted.
Preventing damage to health and accidents
▷Protect your hearing from high volume levels. Permanent
hearing damage may occur when headphones are used
at high volume levels for long periods of time. Head-
phones of the Sennheiser brand sound exceptionally good even at
low and medium volume levels.
▷The product generates stronger permanent magnetic
fields that could cause interference with cardiac pace-
makers, implanted defibrillators (ICDs) and other
implants. Always maintain a distance of at least 3.94"/10 cm
between the product component containing the magnet and the
cardiac pacemaker, implanted defibrillator, or other implant.
▷Keep the product, accessories and packaging parts out of reach
of children and pets to prevent accidents. Swallowing and chok-
ing hazard.
▷Do not use the product in an environment that requires your spe-
cial attention (e.g. in traffic). Especially the product’s active noise
cancellation can make ambient sounds inaudible or drastically
change the perception of acoustic warning signals.
Preventing damage to the product and malfunctions
▷Always keep the product dry and do not expose it to extreme tem-
peratures (hairdryer, heater, extended exposure to sunlight, etc.)
to avoid corrosion or deformation. The normal operating tempera-
ture is from 0 °C to 40 °C/32 °F to 104 °F.
▷To avoid loud, unusual (whistling or beeping) noise and to ensure
proper noise cancellation, do not cover the microphone openings
of the active noise cancellation circuitry located on the outside of
the ear cups.
▷Use only attachments/accessories/spare parts supplied or rec-
ommended by Sonova Consumer Hearing.
▷Clean the product only with a soft, dry cloth.

Important safety instructions
ACCENTUM | 3
Safety instructions for Lithium rechargeable batteries
Notes on data collection and processing and on firmware updates
This product stores individual settings such as the volume, the
sound profiles and the Bluetooth connection data of paired devices.
This data is required for the operation of the product and is not trans-
ferred to Sonova Consumer Hearing GmbH or companies commis-
sioned by Sonova Consumer Hearing GmbH and is not processed.
WARNING
If abused or misused, rechargeable batteries may leak. In
extreme cases, they may even present a risk of:
•explosion
• heat and fire development
• smoke and/or gas development
• damage to health and/or the environment
Only use rechargeable batteries and chargers recom-
mended by Sonova Consumer Hearing.
Do not leave the product / rechargeable batteries unat-
tended while charging.
Only charge the product / rechargeable batteries at
ambient temperatures between 10 °C and 40 °C/50 °F
and 104 °F and do not charge them near easily flamma-
ble objects.
Do not charge the product / rechargeable batteries in a
damp environment. Make sure that the charging socket
is free from moisture and contamination.
Do not heat the product / rechargeable batteries above
60 °C/140 °F. Avoid exposure to sunlight and do not
throw the product / rechargeable batteries into fire.
Switch rechargeable battery-powered products off after
use.
When not using the product / rechargeable batteries for
extended periods of time, charge them regularly (about
every three months).
Avoid prolonged skin contact with the product,
rechargeable battery, charger or charging cable when
connected to a power source. These components can
heat up during charging and cause skin irritation.
Dispose of defective products with built-in rechargeable
batteries at special collection points or return them to
your specialist dealer to facilitate recycling.

Important safety instructions
4 | ACCENTUM
Using the “Sennheiser Smart Control” app, you can update the firm-
ware of the product for free via an Internet connection. If the device
on which the app is installed is connected to the Internet, the follow-
ing data is automatically transferred to and processed by Sonova
Consumer Hearing servers in order to provide and transfer suitable
firmware updates: hardware identifier, hardware revision number,
firmware version of the product, operating system type (Android,
iOS) and version, version of the app. The data will only be used as
specified and will not be stored permanently.
If you do not want this data to be transferred and processed, do not
connect to the Internet.
Notes on the use of headphones in damp environments
Headphones are an everyday companion. When using the head-
phones on the go, they may be exposed to moisture. For example,
rain, air humidity or even sweat may come into contact with the
headphones.
To ensure proper, safe and long-lasting performance:
▷Avoid contact with moisture and always keep headphones dry.
▷Do not use headphones in the rain/snow or in the shower.
▷Do not use headphones in swimming pool, sauna or during other
activities with water/high air humidity (e.g. washing dishes).
▷Do not store headphones in airtight containers/bags together
with damp objects (e.g. damp laundry) or objects that can cause
condensation moisture (e.g. cold water bottles).
▷Never charge damp headphones. Make sure that the charging
socket is free from moisture and contamination.
If your headphones have become damp or wet:
▷Dry headphones completely with a dry cloth.
▷Allow headphones to dry at room temperature for at least
24 hours before using and charging them again.
▷Do not continue to use the product if it is obviously defective.

Important safety instructions
ACCENTUM | 5
Intended use/Liability
These headphones have been designed as an accessory for Blue-
tooth compliant devices. They are intended for wireless audio com-
munication such as music playback and phone calls via Bluetooth
wireless technology.
It is considered improper use when the product is used for any appli-
cation not named in the corresponding product documentation.
Sonova Consumer Hearing GmbH does not accept liability for
damage arising from misuse or improper use of this product and its
attachments/accessories.
Sonova Consumer Hearing GmbH is not liable for damages to USB
devices that are not consistent with the USB specifications.
Sonova Consumer Hearing GmbH is not liable for damages resulting
from the loss of connection due to flat or overaged rechargeable bat-
teries or exceeding the Bluetooth transmission range.
Before putting into operation, please observe the respective coun-
try-specific regulations.

Package contents
6 | ACCENTUM
Package contents
Online you can find:
• this detailed instruction manual and additional information
(www.sennheiser-hearing.com/download)
• the Sennheiser Smart Control app for configuring the head-
phones and for additional functions
(www.sennheiser-hearing.com/smartcontrol)
• a list of accessories on the ACCENTUM product page at
www.sennheiser-hearing.com/accentum
to purchase online or contact your local Sonova Consumer Hear-
ing partner:
www.sennheiser-hearing.com/service-support
ACCENTUM around-ear headphones
Model: ACAEBT
USB cable with USB-C and USB-A connector,
length approx. 1.2 m
Quick guide
Safety guide

Product overview
ACCENTUM | 7
Product overview
ACCENTUM
Model: ACAEBT
Ear pads
Headband, steplessly adjustable
Ear cups
Speech microphones (2 pcs.) for phone calls
LED display
USB-C socket for charging, calling, streaming via PC/Mac
Volume + button
Music and voice control button
Volume - button
R
3
4
3
6
2
1
5
0
9
8
A A
BB
7
4

Product overview
8 | ACCENTUM
Overview of the controls
Switch-on of the headphones
• Press the main button for 3 seconds
Overview of the LED display
During operation
During phone calls
Main button
• On/off button
• Voice assistant button
• Pairing button: pressing for 5 seconds activates the
Bluetooth pairing mode
Marking for the right ear (R) and for the left ear (L)
(inside the ear cups)
Microphones for the active noise cancellation ANC;
2x directed outward, 2x directed inward (not visible)
LED Meaning/headphones...
white
lights up for
5seconds
... switch on
white
flashes 3x
... are connected to a device via Blue-
tooth
white-red
flashes ... are in Bluetooth pairing mode
red
flashes 3x ... switch off
LED Meaning
white
flashes 10x
repeatedly
Incoming call
3s
Hold
5 s
3x
3x
10x

Product overview
ACCENTUM | 9
During charging
Overview of sound signals and voice prompts
The headphones output voice prompts and sound signals in case of
various events.
You hear short sound signals when the headphones
• are switched on or off,
• are in pairing mode (melody),
• detect devices in the pairing list,
LED Meaning
flashes red Battery charge is 0 % to 20 %.
flashes yellow Battery charge is 20 % to 90 %.
flashes green Battery charge is 90 % to 100 %.
lights up green
for 5 minutes
When the rechargeable battery is
100% charged, the LED lights up for
5minutes and then goes off.
If the LED display does not light up:
• Clean the charging socket (> 34).
• Charge the rechargeable battery until the LED display lights
up again (at least 30 minutes) (> 13). If the rechargeable bat-
tery is completely discharged, it may take several minutes
for the LED display to indicate the charging process.
Via the Smart Control app, you can adjust settings for the voice
prompts and sound signals (> 31).
Voice prompt Meaning/headphones...
Establishing a Bluetooth connection
“Connected” ...are connected via Bluetooth.
“No connection” ... have lost the Bluetooth connec-
tion to a paired device.
“Pairing successful” ... have successfully completed
Bluetooth pairing.
“Pairing failed” ... have not successfully completed
Bluetooth pairing.
Information on battery status and volume
“Recharge headset”
... has an empty rechargeable bat-
tery. Charge the rechargeable bat-
tery (> 13).
“More than xx % battery left” ... indicates the remaining battery
charge in percent.
“Volume min” ... has reached the minimum volume
setting.
“Volume max” ... has reached the maximum
volume setting.
“Mute on” ... mutes the microphone.
“Mute off” ... activates the microphone again.
5min

Product overview
10 | ACCENTUM
• cancel the pairing process,
• receive commands via one of the buttons (increasing the volume,
starting/pausing music playback, accepting/holding/rejecting
calls, adjusting the ANC function or Transparency Mode),
• receive an incoming call (ring tone).

Getting started
ACCENTUM | 11
Getting started
1. Charging the rechargeable battery
The headphones’ rechargeable battery is not fully charged upon
delivery.
▷Before using the headphones for the first time, charge the
rechargeable battery for a complete charging cycle without inter-
ruption (> 13).
2. Connecting the headphones to a Bluetooth
device
▷Connect the headphones to your smartphone via Bluetooth (> 14).
3. Smart Control app for your smartphone
The Sennheiser Smart Control app allows you to use all functions
and settings of the headphones and to e.g. adjust the sound to your
liking using the equalizer (> 18).
4. Putting the headphones on and adjusting the
headband
For good sound quality and best possible wearing comfort, the head-
band can be adjusted to properly fit your head (> 20).
USB-AUSB-C
5s
ON
Connected
......
ACCENTUM
“Sennheiser Smart Control”
ACCENTUM

Using the headphones
12 | ACCENTUM
Using the headphones
Information on the rechargeable battery
and the charging process
The headphones have a built-in rechargeable battery. A complete
charging cycle takes approx. 3 hours. The charging time can vary
depending on the power source used and the ambient temperature.
Before using the headphones for the first time, charge the recharge-
able battery for a complete charging cycle without interruption.
When the headphones are being charged, the LED display lights up
(>8). Once the headphones are 100% charged, the LED lights up
green for 5 minutes and then goes off. When the battery charge
drops to a low level, the voice prompt “Recharge headset” asks you
to recharge the headphones. If the headphones are not charged, the
voice prompt will be repeated every 10 minutes until the headphones
switch off.
Sonova Consumer Hearing recommends using the supplied USB
cable and a compatible standard USB power supply for charging the
headphones.
While the headphones are being charged, you can still listen to
music or make phone calls. In this case, however, the charging time
may be longer.
At the end of its operational lifetime, this product with its built-in
rechargeable battery must be disposed of separately from normal
household waste. You can find more information here: > 39.

Using the headphones
ACCENTUM | 13
Charging the headphones’ rechargeable
battery
1. Make sure that the charging socket is free from moisture and con-
tamination. Connect the USB-C connector of the charging cable
to the USB socket of the headphones.
2. Connect the USB-A connector to a corresponding socket of a USB
power source (to be ordered separately). Make sure that the USB
power source is connected to the power supply system.
The charging process of the headphones begins. The LED display
indicates the charge status.
If the LED display does not light up:
▷Clean the charging socket (> 34).
▷Charge the rechargeable battery until the LED display lights up
again (at least 30 minutes) (> 13). If the rechargeable battery is
completely discharged, it may take several minutes for the LED
display to indicate the charging process.
R
USB-C
USB-A
LED Meaning
flashes red Battery charge is 0 % to 20 %.
flashes yellow Battery charge is 20 % to 90 %.
flashes green Battery charge is 90 % to 100 %.
lights up green
for 5 minutes
When the rechargeable battery is
100% charged, the LED lights up for
5minutes and then goes off.
You can speed up the charging process by charging the head-
phones when they are switched off.
If you disconnect the USB connection during or after charging,
you will hear a voice prompt informing you of the remaining
battery life.
5min

Using the headphones
14 | ACCENTUM
Connecting the headphones to a
Bluetooth device
To be able to use the Bluetooth connection, you must register both
devices (headphones and e.g. smartphone) once. This process is
called pairing.
If operation differs from the steps mentioned, also refer to the
instruction manual of the Bluetooth device you are using.
If you switch on the headphones for the first time (the pairing
list is empty), they automatically switch to pairing mode.

Using the headphones
ACCENTUM | 15
Information on the Bluetooth wireless
connection
The headphones are compliant with Bluetooth 5.2.
If your audio source supports one of the following high-resolution
audio encoding methods, music is automatically played in high audio
quality: aptX™ HD (aptX™, aptX™ Low Latency) or AAC. Otherwise
the headphones will play your music in normal audio quality (SBC).
Paired devices establish the Bluetooth wireless connection immedi-
ately after switch-on and are ready for use.
On switch-on, the headphones automatically try to connect to the
last two connected Bluetooth devices. The headphones can save the
connection profiles of up to six Bluetooth devices with which they
have been paired. Audio playback is only possible from one device at
a time.
If you pair the headphones with the seventh Bluetooth device, the
saved connection profile of the least used Bluetooth device will be
overwritten. If you want to re-establish a connection with the over-
written Bluetooth device, you have to pair the headphones again.
Paired and connected Bluetooth device
Paired Bluetooth device (currently not connected)
1
2
3
4
5
6

Using the headphones
16 | ACCENTUM
Pairing the headphones with a Bluetooth
device
1. Switch the headphones off and place them close to the Bluetooth
device (max. 20 cm).
2. Press the main button for 3 seconds.
The headphones are switched on and you hear a sound signal.
The LED lights up white for 5 seconds.
3. Press the main button for 5 seconds.
The headphones switch to pairing mode. The LED flashes alter-
nately white and red.
4. Activate Bluetooth on your Bluetooth device.
5. Via the menu of your Bluetooth device, start the search for new
Bluetooth devices.
All active Bluetooth devices in the proximity of your Bluetooth
device are displayed.
6. From the list of found Bluetooth devices, select “ACCENTUM”. If
necessary, enter the default pin code “0000”.
7. If pairing was successful, you hear the voice prompts “Pairing
successful” and “Connected” one after the other. The LED flashes
white 3x.
If you switch on the headphones for the first time (the pairing
list is empty), they automatically switch to pairing mode.
By default, the name of the headphones is “ACCENTUM”. You
can individually adjust the name in the Smart Control
app (> 18).
If no connection is established within 2 minutes, pairing mode
is terminated and the headphones switch to standby mode. If
necessary, repeat the steps described above.
5s
ACCENTUM
......
ON
3x
1. 2.
3. 4.

Using the headphones
ACCENTUM | 17
Switching the connection to paired
Bluetooth devices/“Connections”
To selectively switch the audio connection to paired Bluetooth
devices using the “Connections” function, you require the Smart
Control app (> 18).
▷In the Smart Control app, tap “Connections”.
The list of Bluetooth devices paired with the headphones
appears.
▷From the list, select the paired device to which you want to con-
nect the headphones. Make sure that the desired device is
switched on and Bluetooth is activated.
The Bluetooth audio connection between the desired Bluetooth
device and the headphones is established.
The app connection between the device with the Smart Control
app installed and the headphones remains active (only Bluetooth
Low Energy for communication between app and headphones,
the device name is highlighted in bold).
Disconnecting the headphones from a
Bluetooth device
▷Via the menu of your Bluetooth device, disconnect the connection
to the headphones.
The headphones are disconnected from the Bluetooth device.
You hear the voice prompt “No connection”. The headphones
switch to standby mode.
The “Connections” function also allows you to selectively
delete pairing information of devices without resetting the
headphones to the factory default settings.
To delete the Bluetooth pairing list of the headphones: > 37.

Using the headphones
18 | ACCENTUM
Installing the Smart Control app
To make full use of all the settings and functions of the headphones,
you need to have the free Sennheiser Smart Control app installed on
your smartphone.
Download the app from the Apple App Store or Google Play and
install it on your smartphone. Alternatively, you can use your smart-
phone to scan the following QR code or to call up the following Inter-
net site:
www.sennheiser-hearing.com/smartcontrol
•Google Play Store: click
•Apple App Store: click
▷Connect your smartphone to the headphones via Bluetooth (> 14).
▷Start the Smart Control app.
▷Follow the instructions in the app.
The Smart Control app recognizes the headphones and activates
all available settings and functions.
Switching the headphones on
▷Press the main button for 3 seconds.
The LED lights up white for 5 seconds. You hear a sound signal. If
Bluetooth is activated on the headphones and a paired device is
available, the LED flashes white 3x and you hear the voice prompt
“Connected”.
If Bluetooth is deactivated on the headphones (> 31), you only
year a sound signal.
WARNING
Danger due to high volume levels!
Listening at high volume levels can lead to permanent
hearing defects.
▷Before putting the headphones on, adjust the volume
to a low level (> 21).
▷Do not continuously expose yourself to high volume
levels.
3s
Hold
5s

Using the headphones
ACCENTUM | 19
Switching the headphones off
▷Press the main button for 3 seconds.
You hear a sound signal. The LED flashes red 3x. The headphones
switch off.
Make sure that Bluetooth is already activated on your Blue-
tooth device when switching on the headphones.
If Bluetooth is activated and the headphones cannot find a
paired Bluetooth device within a few minutes, you hear the
voice prompt “No connection”. The LED flashes red 3x. The
headphones switch to standby mode.
1.
3s
3x

Using the headphones
20 | ACCENTUM
Putting the headphones on and adjusting
the headband
For good sound quality, the best possible noise cancellation and the
best possible wearing comfort, the headband can be adjusted to
properly fit your head.
▷Wear the headphones so that the headband runs over the top of
your head. The markings for the right side (R) and for the left side
(L) can be found on the inside of the ear cups.
▷Move the ear cups up or down the headband slider until:
– your ears are comfortably covered by the ear pads,
– you feel even, gentle pressure around your ears,
– a snug fit of the headband on the head is ensured.
For optimal sound quality, the ear pads must completely surround
your ears.