Honeywell PA/VA Training

1. Honeywell PA/VA Training

2. What’s Loudspeaker? • A loudspeaker (or "speaker") is an electroacoustic transducer that produces sound in response to an electrical audio signal input. • We need them to: • PA: Play background music and voice in public applications • VA: To clearly convey voice information in emergencies In one word , loudspeaker is to play sound

3. Important Specs of Loudspeaker Power/Impedance SPL/Sensitivity Directionality Dispersion Angle

4. Definition SPL/Sensitivity Power/Impedance Power rating is the amount of energy that a loudspeaker can handle without distortion. It is directly proportional to the volume. Impedance is the resistance within the enclosure to a flow of power from a speaker’s amplifier. It is used to limit the desired amount of power transferred to the speaker. Sound pressure level (SPL) is the loudness of sound. The unit for measuring SPL is Decibel (dB). Sensitivity is a measurement of the amount of sound output derived from a speaker with one watt of power input. Dispersion Angle Directionality Directionality indicates the spatial distribution of the sound intensity. For directional sound source, the SPL in different direction from the sound source will be different, which can be seen from the polar diagram. Dispersion angle defines the space a loudspeaker can cover. Usually, the bigger dispersion angle, the less loudspeakers can be used in the same space.

5. Some important Charts • Polar Diagram • To show the sound distribution in all directions • Circuit Diagram • To show how to connect the line of the transformer to the constant voltage amplifier Power tapping

6. Signal-to-Noise Ratio • Initial sound signal (in dB) compared to the background (or ambient)sounds • Ideal: 10 – 15 dB above average ambient sound • Each doubling of power to a loudspeaker OR doubling of loudspeakers results in an increase of 3dB • Doubling the distance between the listener and the sound source results in a 6dB loss

7. Frequency Response • Frequency Response • Ideal range: 150 – 11KHz • Average Human Listening Range: 200 – 5000 Hz • Frequency response should be as flat as possible for the most intelligible sound Most Agency Standards require within 10 to15 B windows Frequency Response Curve - A visual representation of the dB level over a specific frequency range

8. Harmonic Distortion • The average listener can detect 2% total harmonic distortion (THD) • 15% distortion is considered to be non-intelligible • Contributing Factors • Tolerance of the message generator and amplifier • Loading of the audio amplifier (load vs. available power) • Mechanical factors • Wires touching the cone of the speaker • Excessive voltage drop in speaker line • Vibration caused by poor installation • Damaged speakers

9. Reverberation • Closely spaced echoes that cannot be distinguished • Minimizing reverberation is key to achieving acceptable intelligibility • Factors influencing reverberation • Room size (volume and surface area) • Reflective properties of room surfaces • Speaker orientation • Decibel output

10. Categories of Loudspeaker • Ceiling loudspeaker • “Hottest” loudspeaker • Indoor application • Types: • Power of loudspeaker: 6/3/1.5W is the most common • Size of speaker:2’’ to 8’’, 5’’&6.5’’ is the most common • Housing material: ABS and iron is the most common • Appendix: Metal dome , ABS dome ,surface installation appendix etc.

11. Categories of Loudspeaker • Projection loudspeaker • Outstanding feature: Strong directionality in sound distribution • Particularly suitable for some narrow and long space, like tunnels and corridors • Type: • Direction: Unidirectional and bidirectional • Power of loudspeaker: 10W, 20W is the most common • Housing materials: ABS and aluminum

12. Categories of Loudspeaker • Cabinet loudspeaker • Good use for playing music with subwoofer and tweeter • Very common use in indoor applications such as meeting rooms, hotels etc. • Type: • Power of loudspeakers: 20 to 80W is very common. • Housing materials: ABS for indoor, aluminum for very little outdoor use

13. Categories of Loudspeaker • Column loudspeaker • Able to play music and voice in big area • Water and dust proof ability are usually required • Usually used in outdoor applications • Type: • Power of loudspeaker: full range from 20W to 80 W, with several speakers. • Housing materials: ABS, Iron & Aluminum

14. Categories of Loudspeaker • Horn loudspeaker • Able to play voice in much bigger volume than other categories, no good music performance as others • Special design in speakers and struture • Best choice in spacious and noisy applications, such as train stations, factories etc. • Type: • Power of loudspeaker: 10 W and above. • Housing material: ABS and aluminum is common

15. Categories of Loudspeaker • Pendant loudspeaker • Less common used loudspeaker • Wider sound distribution directions • In some indoor applications without false ceiling ,it takes the place of ceiling loudspeaker

16. What We Want for Loudspeaker ? Cost-effective Beautiful appearance Excellent acoustic performance Robust material Easy for installation

17. How to choose speaker wisely? • Per project architecture design for environmental match • Ceiling roof ceiling speaker • The room without ceiling surface mount, pendant speaker, wall mounted, indoor column speaker • Outdoor places outdoor column, horn • Garden/grass land weather proof garden or rock speaker • Hall/conference room stylish/fashion wall mount, indoor column speaker • Fire Alarm request EN54 approved speaker • Per EASE Simulation • SPL test • STI test

18. Secure and Effective European standard for VA loudspeaker European Restriction of Hazardous Substances European access standard for electronic products Comply with international safety laws

19. Excellent Acoustic Performance Clear and intelligible audio performance

20. VA :EN 54-24 Loudspeaker Range

21. Voice Alarm Loudspeakers Ten EN54-24 models

22. Cabinet Loudspeaker • L-VWM06A/EN L-VWM06A/EN(C) • 6W metal cabinet loudspeaker，4’’speaker • Clear voice message reproduction and good music playing effect • Pretty design with patent • Simple power setting and easy installation • Available with or without capacitor( part number without “(C)”) to work with different system

23. Specifications High sensitivity to produce stronger sound output Small and light design

24. Suitable Applications Stairway Control Center Boarding Gate Good choice for indoor applications

25. Ceiling Loudspeaker • L-VCM6A/EN L-VCM6B/EN • 6W Voice alarm ceiling loudspeaker • Two size for choice ,5’’ or 6.5’’ speaker unit • Clear voice message reproduction • Robust metal housing with metal back dome to protect the inside components • Available with or without capacitor( part number without “(C)”) to work with different system

26. Specifications Wide frequency response to convey clearer voice message Wide dispersion angle to cover more space

27. Column Loudspeaker • L-VOM20A/EN L-VOM20A/EN(C) • L-VOM40A/EN L-VOM40A/EN(C) • 20W & 40W full range outdoor column ，4’’speakers • Pretty design with patents • Fire resistant aluminum housing to protect inside components • Intelligible voice and superior sound reproduction • Superior dust and water proof ability, complying with IP66 standard • Available with or without capacitor( part number without “(C)”) to work with different system

28. Specifications Multiple power tapping for choice High sensitivity to produce stronger sound output

29. Suitable Applications Garden Square Factory Stadium Superior choice for spacious indoor/outdoor environment

30. Unidirectional Projection Loudspeaker • L-VJM10A/EN L-VJM10A/EN(C) • L-VJM20A/EN L-VJM20A/EN(C) • 10W& 20W unidirectional projection loudspeaker，5’’speaker • Wide frequency response range，low distortion • Outstanding design with patent • Fire resistant aluminum housing to protect inside components • Excellent dust and water proof ability, complying with IP65 standard • Available with or without capacitor( part number without “(C)”) to work with different system

31. Specifications Multiple power tapping for choice Wide frequency response to convey clearer voice message

32. Bidirectional Projection Loudspeaker • L-VBM20A/EN L-VBM20A/EN(C) • 20W bidirectional projection loudspeaker，5’’speaker • Elegant design with patents • Robust fire resistant aluminum housing to protect inside components • Excellent dust and water proof ability, complying with IP65 standard • Available with or without capacitor( part number without “(C)”) to work with different system

33. Specifications Multiple power tapping for choice

34. Thank You!