Bedrock AM100 User manual

Operating manual

AM100

IEC-60268-16 rev. 4 & rev. 5

IEC-61672 Class 2 / ANSI S1.4 Type 2

IEC-61260 Class 0

ISO-717-1 / ISO-16283 / ISO-140

ASTM E336 / ASTM E413

ISO-3382-2

ANSI S12.2 / ISO-1996

AES17

2 Bedrock AM100 operating manual © Bedrock Audio BV, 2021

Contact information and support

The Bedrock AM100 is designed and manufactured by Bedrock Audio B.V. in the Nether-

lands.

The manufacturer can be contacted at the following address:

Bedrock Audio BV

Ampèreweg 18

2627 BG DELFT

The Netherlands

www.bedrock-audio.com

Phone: +31 88 8770700

Fax: +31 88 8770799

Email: [email protected]

Updates of the system’s firmware and documentation are released online :

www.bedrock-audio.com/support

NOTE: All screenshots and product pictures shown in this manual correspond to the

AM100 running firmware version 3.0.0, hardware revision A. If you are using a different

device model or a different firmware version, the screenshots may not fully correspond to

what is being displayed on your device’s screen.

Bedrock Audio and Embedded Acoustics are registered trademarks.

Bedrock Audio and Embedded Acoustics explicitly reject liability for damages resulting

from any incorrect readings and measurements obtained with any Bedrock device.

Document version 3.0.0 release date October 2021. Applies to model(s): Bedrock AM100.

4 Bedrock AM100 operating manual © Bedrock Audio BV, 2021

Contents

Contact information and support 3

1. Introduction 8

2. New features compared other 9

Bedrock instruments (SMxx) 9

3. How to use this manual 10

New in firmware version 3.0 10

4. General use and safety precautions 11

4.1. Safety precautions when charging 11

4.2. Safety precautions related to connectors 12

5. Getting started 13

5.1. Preparing and booting the AM100 13

5.2. The AM100 main menu 13

5.3. Customizing the main menu 15

5.4. Top bar 16

5.5. Drop-down menus: signal generator and settings 17

5.6. General layout of the user interface 18

5.7. Copy measurements results to a computer 19

5.8. Connecting microphones, headsets and other devices 20

5.9. Some more tips and tricks 21

6. Speech intelligibility measurements 22

6.1 Quick STIPA 22

6.2 STI average 25

6.3 STIPA pro 26

6.4 Full STI 30

6.5 Speech Level Meter 33

7. Level and spectrum 34

7.1 SPL meter 34

7.2. LEQ logging 37

7.3. Real-Time Analyzer (RTA) 41

7.4. Fast Fourier Transform analyzer 43

7.5. Statistical acoustics (percentiles) 45

7.6. RTA logging 47

8. Room acoustics 48

8.1. Reverberation Time meter (RT60) 48

8.2. Noise curves 55

9. Electro-acoustics 58

9.1. Oscilloscope 58

9.2. Polarity 59

9.3. Electric in RTA and FFT 60

4 Bedrock AM100 operating manual © Bedrock Audio BV, 2021

10. Electric analysis 61

10.1. AC Volt meter 61

10.2. Fundamental frequency estimation (Hz) 62

10.3. Total Harmonic Distortion and Noise (THD+N) 63

11. Building acoustics 65

11.1. Sound insulation 65

11.2. SRI / STC 70

12. Other modules and control modes 72

12.1. Calibration 72

12.2. Settings 74

12.4. Network 77

12.4. Status 78

12.5 USB audio device mode 79

13. Accessing saved data 80

13.1. Connect USB cable 80

13.2. Copy your measurement data 80

13.3. Resetting measurement number series 81

13.4. About the file format 81

13.5. Downloading recorded audio 81

13.6. Downloading screenshots 81

13.7. Further use of USB 81

14. Remote control 82

14.1. Establishing a connection 82

14.2. Remote duplication of the AM100 screen (Bedrock Studio) 83

14.2. The Bedrock remote control API 85

15. Power and charging 86

15.1. Charging instructions 86

15.2. Power saving recommendations 87

15.3. Use of power banks and external battery packs 87

16. Cleaning, maintenance and calibration 88

Battery disposal 88

17. Product warranty 89

18. Firmware updates 91

18.1.Getting the latest firmware for your device 91

18.2. Installing new firmware 91

18.3. Recovery mode 92

19. Buttons, icons and symbols 94

20. Technical specifications 98

Linear range 99

6 Bedrock AM100 operating manual © Bedrock Audio BV, 2021

21. Troubleshooting 100

Annex A. Correction factors for SPL measurements (IEC-61672) 103

AnnexB.Manufacturer’sinstructionsforperiodictestingaccordingtoIEC-61672-3. 116

AnnexC.Manufacturer’sinstructionsforperiodicvalidationofSTItestfunctions 118

6 Bedrock AM100 operating manual © Bedrock Audio BV, 2021

8 Bedrock AM100 operating manual © Bedrock Audio BV, 2021

Class 1 / type 1

microphone

Power button

Charge status LED

USB charge & data

port

Touch screen

2nd input channel

Headset/

generator jack

1. Introduction

CongratulationsonpurchasingyourBedrockmeasuringinstrument!TheBedrockAM100

is our flagship instrument, featuring the latest technology and complying with the most

recent standards.

Using the AM100 is quite easy, thanks to its touch-screen operation and intuitive menu

structure. Most users will get the hang of doing measurements with the AM100 without

spending too much time with this manual. Nonetheless, we strongly recommend that you

do read chapters 1-5 of this manual before using your AM100 for the first time, in order to

getacquaintedwiththevariousfeaturesofthedevice,aswellastheproceduresforcharging

and maintenance. With a little care, you can expect years and years of reliable and trouble-

free operation from the Bedrock AM100.

Rubber acoustic

diffuser ring

8 Bedrock AM100 operating manual © Bedrock Audio BV, 2021

2. New features compared other

Bedrock instruments (SMxx)

UserswhohavepreviouslyworkedwiththeBedrock SM30, SM50 or SM90willexperience

a smooth and seamless transition to the Bedrock AM100. The user interface will appear

very familiar and most menus and controls are found in approximately the same places

as on the SMxx. All the modules, methods and features previously offered on the Bedrock

SM90 are also found on the AM100. Nevertheless, the AM100 has been significantly im-

proved and expanded in various ways:

New features

• Second simultaneous input channel, e.g. for frequency transfer function measure-

ments.

• Headsetconnectivity,to listen in on the measurementmicrophoneandto record voice

annotations with your measurements.

• Built-in signal generator for STI signals, noise, sine waves and sweeps.

• Elaborate self-test capabilities

• Transfer data and recorded audio via WiFi.

• Remote control / remote operation via Bluetooth.

• (optional) built-in GPS to store locations for each measurement .

Improved specifications

• Improved electro-acoustic specs, including a greater dynamic range and an exception-

ally flat frequency response.

• High-resolution capacitive touch screen.

• Extremely sturdy aerospace-grade aluminium enclosure.

• Improved user interface; control the most important settings through drop-down

menus without having to switch modules.

• Improved battery life.

• Better overall battery management (e.g. more accurate battery gauge, ability to con-

tinue charging while measuring).

• USB-C connector capable of USB PD3.1 fast charge modes.

• Faster data transfer and firmware updates.

TheBedrockAM100sharesitsoutputfileformatswiththerestoftheBedrockseries,mean-

ing that our Excel tools and any customized spreadsheets or existing third-party software

will work with the AM100 as well.

10 Bedrock AM100 operating manual © Bedrock Audio BV, 2021

3. How to use this manual

Depending on how you plan to use your Bedrock AM100, not all information in this man-

ual may be equally interesting or relevant. If you are new to the Bedrock family of acoustic

measuring instruments, we strongly recommend that you read the following chapters:

• Chapter 4: General use and safety precautions

• Chapter 5: Getting started

• Chapters on the measurement modules that you plan to use first

• Chapter 15: Power and charging

• Chapter 16: Cleaning, maintenance and calibration

We recommend reading the chapters on the various measurement modules as you plan to

use them. As some of the modules implement complex measurement procedures, using

those modules may require you to spend some time with this manual, and possibly also

third-party source of information (such as online tutorials and course manuals).

The following sections should be read if you are experiencing issues with your device or if

you need to upgrade your firmware:

• Before getting support from your Bedrock audio vendor, please consult the

Troubleshooting section (chapter 21)

• Consult the section on Firmware updates (chapter 18) before trying to in-

stall new firmware on your device. Failure to follow firmware update in-

structions precisely may render your device permanently inoperable and

voids your warranty.

Towards the end of this manual, you will find detailed information in tables and appendi-

ces that may not be needed for everyday use of the device. In particular, these appendices

containproceduresfor periodic testing, as needed by3rdpartylabsfor calibration and (re-)

certification of your instrument.

New in firmware version 3.0

Firmware version 3.0 is similar in terms of supported modules to firmware 2.x. Support

was added for new hardware found only on the AM100, such as Wifi, Bluetooth, headset

connector, signalgeneratorandacousticself-test.Itroductionofthetopbar(withtwo drop-

downmenus)makesit much easier to adjust settings on-the-fly, and also providesaccessto

new features such as the internal signal generator.

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