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Headset Microphone (Boom Microphone) Tips

bulletThe proper speaking distance is 3 - 5 cm from your mouth 
to the microphone, for the best sound reproduction.
bulletWhen the microphone is too close to your mouth or you speak too loud, the speech clarity will be impaired.
bulletRemember to turn your Microphone "Off" when:
bulletyou speak to a student privately.
bulletyou leave the Classroom
bulletto speak to someone.
bulletto go to the washroom.
bulletHeadset Microphones deliver Better Audio Quality than
Lapel Microphones because they are located closer to your mouth.
bulletHeadset Microphones Pick Up Less Background Noise than 
Lapel Microphones because they are Unidirectional and
require Less Amplification (due to being closer to your mouth).
bulletHeadset Microphones are Less Likely to Feedback
because they are Unidirectional and require Less Amplification.
bulletHeadset Microphones Allow for Higher Volume Settings 
before Feedback.
bulletHeadset Microphones 
Deliver a more Trouble Free Mode of Operation
.

Body Pack Tips

bulletRemember - the Microphone Connector Screws on to the Body Pack.
bullet

Carrying the Body Pack

Battery Tips

bulletBattery Type - One Nine Volt Battery
bulletBattery Life and Capacity
bulletAlkaline Battery
bullet10 Hours Continuous Operation 
bullet500 mAh
bulletRechargeable Nickel-Hydride Ni-MH Battery
bullet3 Hours Continuous Operation
bullet150 mAh
bulletNi-MH Batteries have about 1/3 the Capacity of Alkaline Batteries
but they can be recharged up to 1000 times.

Battery Charger Tips

bulletRecharges One or Two - 9 Volt Nickel-Hydride Ni-MH Batteries
bulletRechargeable Ni-MH Batteries have No Memory 
they  can be recharged at any time.
bulletBattery Charge Time = 14 hours for a fully discharged battery
bulletAuto Shutoff - after 15 Hours - for Safety Purposes
bulletTo Restart the Charger
bulletUnplug the Charger and Plug it in Again.
bulletor turn the Power to the Charger "Off" and then "On" Again.
bulletVarta Ni-MH Batteries can be recharged up to 1000 times.

UHF "True Diversity" Receiver Tips

bulletSet the UHF Output Level to Maximum and always use the Amplifier Volume Control to Adjust the Audio Level in the Classroom.
(It is better to amplify a higher level signal than to amplify a lower level signal to minimize the amount that you amplify any amplification noise.)
bulletNote: The "True Diversity" UHF Wireless Receiver constantly compares the UHF Signal Strength from the two antennas and then chooses the stronger signal to receive. In this way there are no "drop-outs" or interruptions in the reception due to variations in the signal strength as the teacher moves around the classroom.
bulletRaise the two antennas at a 45 degree angle outward from a vertical line.

Amplifier Tips

bullet

The A-901A Amplifier and the A-903MK2 Amplifiers are equipped with a F-121C Equalization Module to enhance the audio quality of the F-121C Speaker.

bullet

 

H-3 "Wall Mount" Speaker Tips

bullet

The Sound Source & The Amplified Sound emanate from 
the Same Direction

Using the H-3 Speaker, the Sound Source (the Teacher's Voice) and the Amplified Voice emanate from the same direction (the front of the classroom) to deliver the best Audio Clarity & Intelligibility to the Students.

bullet

Point Source Sound
The H-3 with its wide dispersion pattern makes it possible to use only one H-3 Speaker in the Classroom (to have a Single Point Sound Source) which is the best for listening to Speech, from a Clarity and Intelligibility Perspective.

bullet

Flush - Wall Mounting Speaker - Minimum Reflection Design
The H-3 is a Flush - Wall Mounting Speaker which significantly reduces sound wave reflections and the resulting sound coloration that occurs with conventional bracket-mounted "box" type speakers which do not mount flush with the surface of the wall.

bullet

Wide Dispersion Speakers - Minimize the Potential for Feedback
The H-3 Wide Dispersion Speaker disperses the high frequencies throughout the classroom and delivers a more uniform audio level throughout the classroom thereby minimizing the potential for feedback as the teacher walks in front of the H-3 Wall "Mount Speaker". Standard Speakers have a high frequency hot spot, directly in front of them, and are more prone to cause feedback.

F-121C "Ceiling Mount" Tips

bullet

Point Source Sound
The F-121C Speaker with its wide dispersion pattern makes it possible to use only one F-121C Speaker in the Classroom (to have a Single Point Sound Source) which is the best for listening to Speech, from a Clarity and Intelligibility Perspective.

bullet

The F-121C Wide Dispersion Speaker minimizes Hot Spots
The F-121C Speaker disperses the high frequencies uniformly throughout the classroom and makes it possible for the Teacher to walk directly under the F-121C Speaker with a minimum potential for feed back.

bullet

Wide Coverage Area
Please see the attached Application Note: F-121C Application Note.
bullet

Standard Ceiling Speakers disperse sound like Flash Lights.

bullet

Wide Dispersion Speakers disperse sound like Light Bulbs.

bullet

Flush - Ceiling Mount Speaker - Minimum Reflection Design
The F-121C is a Flush - Ceiling Mounting Speaker which significantly reduces sound wave reflections and the resulting sound coloration that occurs with Speakers that Hang from the Ceiling.

Request for More Tips & Comments

bulletWhat additional Tips would you like to see added to this website?
bulletPlease send your them to: webmaster@alphanet.ca  and
we will add them to this website. Thank you

 

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Copyright 2001 & 2002 Alphanet Systems Inc.
Last modified: September 02, 2002