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The method of volume control when public us..

Date: 2016-11-18    Views: 41    Author: lyaudiotech
  

The method of volume control when public use multimedia playback system

In automobile passenger transportation waiting room, the hospital waiting room, airport lounges, use of multimedia television system. For the volume adjustment of the TV , first of all the audio source have to convert to the same size of the audio signal. And then according to the size of the the room and indoor noise, to adjust more appropriate volume on my TV set. 

In this case, can use VR5 automatic volume stabilizer, installed in the input of the television. Multimedia audio signal of the television system, connect to the input interface of the VR5, size is not consistent with the signal,will be converted to the same size automatically. The VR5 automatic volume balance device, with a regulator of output volume , can to adjust the volume of the TV on the VR5 device conveniently .

nstallation of PAGC-24S:

Connections: 
a) Install "External noise detector" (1) supplied in accessories of the machine in the places near passenger seats but far from TV speakers, e.g.: the ceiling above seats or the wall near seats, and make sure the cylindrical end of "External noise detector" (1) positioned toward the noise source. 
b) Insert double-head diameter3.5 mmheadphone plug between the "External noise detector" (1) and “Detector port / MIC IN” (2). Alternatively, insert the audio output plug of "High-sensitivity microphone" that you purchased by yourself into the machine's "Pickup/SENSOR audio in" (3) port, "High-sensitivity microphone” must use DC12V power supply (4). If the waiting room is limited in space, or for purpose of convenience of wiring construction, you can put away "External noise detector" (1) and "High-sensitivity microphone.", although this may impair some audio effect. In such case, "External noise detector" (1) is not inserted in the machine, the built-in noise detection microphone will automatically take the place of it, please avoid placing any object blocking the way between the "Detection/MIC hole" (5) of built-in noise detection microphone and the noise source. 
c) Connect the audio out of multimedia TV system (HTPC/STB) to AUDIO IN of Zealous Follower (10); connect AUDIO OUT of Zealous Follower output (11 or 12) to audio in of TV; the power input connector (13) of the machine must be connected with an external DC12V/0.5-1Aexternal power adapter which is positive inside and negative outside. The "DC-12V OUT" (4) of the machine is only available for "High-sensitivity microphones" of 50 mA or below.

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Commissioning after connections:

a) Push the power switch (15) to "ON" position, the Power indicator LED (16) will illuminate.
b) Adjust the volume output of the TV set-top box to the maximum position without distortion. 
c) Turn TV's volume output to appropriate level for now. 
d) Sensitivity adjustment/MIC GAIN (7) is a concealed adjustment hole for installation technicians to use where necessary, to make adjustment, you must insert a small cross screwdriver in the hole. Here "Where necessary" means that, "External noise detector" not supplied by us is used or intense reflection is caused by some special sound fields, it will be necessary to make adjustment to decrease detection sensitivity to prevent excessive sensitivity. When regulating the concealed potentiometer of "Sensitivity adjustment/MIC GAIN" (7), please watch the LED indicator (8) “Sensitivity overload/OVER”, adjust it till the indicator get dark or flashing position. If you think the ambient noise detection is not sensitive enough, rotate it clockwise. 
e) Follow Rate/FLOATING RATE (6) is a concealed adjustment hole for installation technicians to use where necessary, to make adjustment, you must insert a small cross screwdriver in the hole. If you turn it clockwise, the change of TV volume with ambient noise will be greater. If you think the change of TV volume with ambient noise is not great enough, you can turn Follow Rate (6) clockwise. If you still can’t hear the TV clearly even after Follow Rate (6) has been turned clockwise to the highest level, please turn up the TV volume, till it is able to cover off the noise, and you can hear the TV clearly. However, too high volume may make audience feel uneasy.

Use after commissioning:

After the first commissioning is finished, to use the machine in the future, you just need turn on the power, or if necessary, you only need adjust the TV’s volume, but needn’t change the output volume of TV set-top boxes. The lower the output volume of TV set-top boxes is, the worse the automatic stability of the volume will be.

Installation of PAGC-52M:

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Connections:

1. Install "External noise detector" (1) supplied in accessories of the machine in the places near passenger seats but far from TV speakers, e.g.: the ceiling above seats or the wall near seats, and make sure the cylindrical end of "External noise detector" (1) positioned toward the noise source. 
2. Insert double-head diameter3.5 mmheadphone plug between the "External noise detector" (1) and “Detector port / MIC IN” (2). Alternatively, insert the audio output plug of "High-sensitivity microphone" that you purchased by yourself into the machine's "Pickup/SENSOR audio in" (3) port, "High-sensitivity microphone” must use DC12V power supply (4). If the waiting room is limited in space, or for purpose of convenience of wiring construction, you can put away "External noise detector" (1) and "High-sensitivity microphone.", although this may impair some audio effect. In such case, "External noise detector" (1) is not inserted in the machine, the built-in noise detection microphone will automatically take the place of it, please avoid placing any object blocking the way between the "Detection/MIC hole" (5) of built-in noise detection microphone and the noise source. 
3. Connect audio out of arrival information broadcast system to the primary audio in/(PA)/MAIN (11) of Zealous Follower; Connect audio out of multimedia TV system (TV set-top box) to the secondary audio in (10) of Zealous Follower
Alternatively, you may connect microphone of bus driver to the unit's microphone in port /PA MIC IN(17). Connect the hybrid audio out/MIX (12) to audio in ports of TV and amplifiers; the unit's power input connector/DC12V IN (13) must be connected with external DC24V to 12V power conversion filter which is positive inside / negative outside. The "DC-12V OUT" (4) of the machine is only available for "High-sensitivity microphones" of 50 mA or below. 
4. The unit's primary and secondary audio in each has two mono inputs. Hybrid audio output also has two mono outputs.

Commissioning after connections:

1. Push the power switch (15) to "ON" position, the Power indicator LED (16) will illuminate. 
2. Adjust the volume output of the TV set-top box to the maximum position without distortion. 
3. Turn TV's volume output to appropriate level for now. 
4. Sensitivity adjustment/MIC GAIN (7) is a concealed adjustment hole for installation technicians to use where necessary, to make adjustment, you must insert a small cross screwdriver in the hole. Here "Where necessary" means that, "External noise detector" not supplied by us is used or intense reflection is caused by some special sound fields, it will be necessary to make adjustment to decrease detection sensitivity to prevent excessive sensitivity. When regulating the concealed potentiometer of "Sensitivity adjustment/MIC GAIN" (7), please watch the LED indicator (8) “Sensitivity overload/OVER”, adjust it till the indicator get dark or flashing position. If you think the ambient noise detection is not sensitive enough, rotate it clockwise. 
5. Follow Rate/FLOATING RATE (6) is a concealed adjustment hole for installation technicians to use where necessary, to make adjustment, you must insert a small cross screwdriver in the hole. If you turn it clockwise, the change of TV volume with ambient noise will be greater. If you think the change of TV volume with ambient noise is not great enough, you can turn Follow Rate (6) clockwise. If you still can’t hear the TV clearly even after Follow Rate (6) has been turned clockwise to the highest level, please turn up the TV volume, till it is able to cover off the noise, and you can hear the TV clearly. However, too high volume may make audience feel uneasy. 
6. Regulate the microphone of the bus driver to the appropriate level using volume knob /PA MIC VOLUME(18) of broadcast microphone.

Use after commissioning:

When arrival information (connected to the primary audio in (11) of Zealous Follower) or a microphone broadcast sound appears, the volume of TV music or entertainment programs from the secondary audio in (10) of Zealous Follower will automatically go down.

Several Ways of TV Volume Auto Control in Public Places or Buses:

Nobody may feel surprised to see TV at airports, but they may feel surprised to see the TV always at comfortable volume, they are never noisy, but able to meet the needs of the audience. This reflects the detail management level of the airports, also a quality indicator for comparison between international airports. It is the pride of airports to maintain the most appropriate volume.
If the volume of bus TVs is too high or too low, or there is noise in vehicles or on roads, the arrival message sent from the vehicle broadcast system may sound too loud or too quiet, thus give rise to passenger complaints, cause them to miss stops, or call away driver’s attention.
When we take subway, it is so crowded that we can’t hear the arrival reminders, so passengers are prone to miss stops, then they may complain the volume of vehicle broadcast system is too low or too high.
Such a problem exists in the following industries and deserve our concern: aerospace, airport equipment, transportation, bus, automotive electronics, subway, railway, surveillance & security, entertainment, public facilities engineering, radio systems engineering, PA engineering, engineering designers, public construction projects, weak electricity engineering, advertising media industry, bus TV media.
I. Where special personnel are arranged on the site to manually adjust the TV volume whenever the site noise changes, we can first send the audio signal of be multimedia TV system (STB) to input ports of VR5, ALC-05M, VR-TV, ALC-TV, while connecting the output connectors of auto volume stabilizers of VR5, ALC-05M, VR-TV, ALC-TV to the input ports of TV. The signal of different levels will be automatically controlled to be at the same level. VR5 and VR-TV balancer with automatic volume output volume adjuster. You can manually adjust the TV volume on VR5 or VR-TV based on the ambient noise level of the site.
II. Where 2 Auto Volume Source Stabilizers are used to control two types of sounds respectively. One set of VR5, VR-TV or other TV volume stabilizer is used for TV programs, the other VR5, VR-TV, ALC-05M, ALC-TV stabilizer is used for broadcast. Adjust output volume of VR5 or VR-TV volume stabilizer used for TV programs to be lower than that of broadcast. Manually adjust the TV volume based on the noise level of the site. Keep the volume of arrival reminders greater than TV volume, and the TV volume will not vary with the change of program or advertisement. VR5 and VR-TV automatic volume balancer has output volume adjuster, which can easily adjust the TV volume based on the noise level of the site.
III. Where the new product "Zealous Follower" is used, it has built-in audio source stabilizing function, able to change TV volume automatically at real-time based on noise level of the site. Fine Source PAGC-24S. In the model designation, “24S” means “2 in4 out”, “2 in4 out” refers to mono, the stereo of “1 in2 out”. Sometimes public places are crowded, sometimes are sparse, in addition, noise level varies with different groups and different times. Therefore, the TV volume must be adjusted accordingly based on the ambient noise level, so that the volume could neither be too high nor too low to passengers. The automatic volume stabilizer “Zealous Follower” can achieve such a management effect. For example, it can be applied in waiting rooms of bus stations, railway stations, hospitals, airports. Zealous Follower PAGC-24S" is able to automatically stabilize audio source by itself, and able to detect the noise level of the site, thus change the volume of TV or radio at real-time based on the noise level.
IV. Zealous Follower PAGC-52Mhas two groups of automatic volume stabilizing and control system, i.e.: primary stabilizer (for input of arrival broadcast system or driver broadcast system) and secondary stabilizer (for input of TV programs and advertisement). It is able to automatically follow the noise level of site, and change the volume of TV and broadcast system at real time respectively. When broadcasting arrival messages, the system will automatically reduce the volume of the TV or advertisements. Fine Source PAGC-52M(In the model designation “PAGC-52M”, “52”means “5 in2 out”, “M” means “MONO”. “5 in2 out” refers to “Mono”. It applies to buses, subway where the space is so crowded that information display is obscured. 



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