Borneo swiftlets Innovation: September 2011

2011-09-14

( Internal sound pitch is low with continuous low sequences. It's not the same when compares with External sound. To most it sounds the same. Many still can't differentiate between Internal sound and External sound)

I had received numerous calls regarding the effectiveness of Swiftlets sound for farm

The questions were…..What are considered good sound? How do we find good sound? How do we know the sound we bought is a good sound? What are the criteria of good sound? …. As usual the lists can go on. .

I hesitated and tried not to discuss too much about it, otherwise it would make those who had purchased many Cd sounds confuse and in dilemma whether what they had bought is worth to buy or which Cd amongst the whole bunch they have is really good.

These were the common questions asked by my readers and sometimes it takes me hours to explain to them. Since there so many of them interested to know and wanting to distinguish between good and poor Swiftlet sound, lets revisit what I had written in my previous articles on sound and further explain thoroughly.. Before that let’s have some clear picture of what is sound.

For humans, hearing (sound) is normally limited to frequencies between about 12 Hzand 20,000 Hz (20kHz), although these limits are not definite. The upper limit generally decreases with age. Other species have a different range of hearing. For example, animal like dogs can perceive vibrations higher than 20 kHz. As a signal perceived by one of the major sense is relative sensitive.

Sound is used by many species for detecting danger, navigation, predation, and communication. Many species, such as birds, marines and terrestrial mammals, have also developed special organs to produce sound. This is vital for survival.

Sound frequency is measured in Herz (Hz) or a thousand of Hz which is Khz. The frequency range of Swiftlet echolocation calls is between 1-16 kHz (fullard et al.,1993). These frequencies fall in the range of human hearing which is about 12-20,000Hz.

That is why we are able to hear the Swiftlet clicking sound in farms. Besides the clicking sound for navigation other sounds that are in high and low pitch are use to communicate and to socialize.

The low and high pitch chirping sound from Swiftlet represents certain socialize behavior, thus if you’re experience enough you would be able to distinguish these sounds. Thru my observation there are sound produced by Swiftlet for certain communication purposes. e.g.: the stress sound is produced to inform others about danger, female in heat creates sound during mating season, etc.

Besides that sounds are use for communicate and socialize during mating seasons. If a played sound consists of tones and pitches that associated with heating sound then during the mating season it would attract lots of birds to approach the source of sound thus entering the farm.

So knowing how to identify and distinguish good and poor sound is very important if you want birds to stay and make nests in your farm.

What is good sound? This frequently asked by my readers. A good sound should consist of high and low pitch (in term of frequency) specially set during recording of sound. It is just like tuning the timing of a car engine prior to racing. If the tuning is not done correctly or simply being tuned then the car performance would be jeopardized.

Don’t be mistaken by the “common sound” which is duplicated from one CD to another. It is being copied or burned. This is done without adjusting its frequencies and its pitches. Furthermore certain parts of unattractive sounds in common sound are not removed prior to editing and duplication and commonly copied and burned and sold to others or passes from one farm’s owner to another.

This is what I call “common sound”. I do not believe in using “common sound”. Every farm should have its identity and this make the farm unique. Using a “popular common sound” the chances are your neighbors might be using it too, perhaps in a roll of shop there are few farms using it. Therefore the uniqueness is gone. Immaterial how expensive the “common sound” is or how some claimed it to be good as long at an area there are more than few farms using the same sound then the uniqueness is gone.So the definition of common sound: A sound uses by many farms.

With many farms using the same sound the conditions of Sound Hypnotism will no longer works. It sounds foreign isn’t it? Have you all ever heard about sound hypnotism? I guess not. Those who are experience in Swiftlet sound knew what I meant. In fact sound hypnotism is not new, it has been there since sound system being employed into farm. It is a matter of how in-depth your knowledge in Swiftlet sound is otherwise sound hypnotism is totally foreign to you even though you may have collections of thousand of swiftlet Cd sound.

This is where the farm identity conditions and uniqueness (hypnotism) come in. Did you ever wonder why certain farms that have so many nests and birds perhaps ten of thousands yet when one build a farm next to this existing farm he is unable to attract birds from this old successful farms? Because the old farm has or indirectly conditioned the birds with it farm identity and uniqueness (hypnotism).

Did you ever wonder why those old Sifus always say “never give or exchange your Switlet Cd sound with others”? Because once too many farms are using it then the sound would lose it uniqueness. I strongly believe in that.

A good sound should be carefully mixed with attractive sound of Swiftlet chirping. A combination of many different tunes of low and high pitch that can attract young birds as well as old birds to come into the farm to stay and to make nests.

In order to do this one must understand the interpretation of low and high pitch of the swiftlet chirping and it sequences. Every pitch low or high and it sequences represent certain communications. It’s more complex than we thought. This is beyond sound clarity and sharpness which is the basic of Swiftlet sound recording. Even if the sound of the Cd is very clear and sharp but if it doesn’t have the attractive pitches in it then sound hypnotism will not work.

When I do my sound recording and remix I make sure all the attractive sounds are put into a Cd and setting the right pitch for every chirping. All the Cd sounds that I remixed for my readers are the only copy none of them shared the same copy. All are labeled and recorded specially for every each farm. The purpose is to create uniqueness.

2011-09-13

Capasitor

Polarized vs Non polarized Capacitors
Most capacitors are non polarized (bi-polar) but there are a few that are polarized and have a positive and a negative terminal. Polarized capacitors should never be used for audio transmission (or coupling). The most common and least expensive capacitors used in crossovers are 'electrolytic' capacitors. Electrolytics can be found in both polarized and non polarized versions. When you buy electrolytic capacitors for use in passive crossovers, make sure that they are non polarized. Other capacitors used in passive crossovers such as Mylar, polypropylene and polyester are non polarized.

1. Function of capacitor - it act as a high pass filter which means it will block low freq components and let the high freq components pass through. Capacitor will attenuate the low freq at 6dB/Octave.

2. How to improve the sound quality - birds sound freq around 1KHz to 16KHz. With the right value of capacitor, the low freq components < 1KHz will be filtered off to give clear birds sound.

3. What value to use? - That depend on what type of tweeter you use. For Magnetic Tweeter, the nominal impendance is around 4ohm to 8 ohm. Assume 8ohm impendance is used and the cut-off freq is 900Hz, so you need to use around 22uF capacitor.

For Piezo tweeter, theoritically no cap is needed as piezo itself is capacitance in natural. It has around 0.12uF. If you refers to its impedance chart, the value from 100ohm at 20Hz to around 25ohm at 20KHz. That means it itself will block most of the low freq components. But if you insist to use capacitor, you can use 4.7uF to 10uF value.

4. What type of capacitor? non polar, 100V capacitor 4.7uf.

5. How to connect? - Solder in series in positive terminal.

more info at www.bcae1.com/passxovr.htm

2011-09-12

easy stair

easy to pull on top

Pusa

2011-09-11

"Conductive" Wire Glue WITHOUT Soldering

Electrically 'Conductive' wire glue with advanced micro carbon technology like solder set.

Simply apply it as any others glue and let it dry that's it very easy all without any soldering make electrical connection without soldering or heating to avoid from swiftlets dislike like smoke, bad smell and easy to carry without any extend wired get trouble on your work.

Swiftlets hunter Amp

Product

4 channel 2 slot, 2 timer, 100w

6 channel 2 slot ,2 timer, 300w

6 channel 3 slot, 3 timer, 200w

8 channel 3 slot, 3timer, 200w

Quality Amp

Solar Chases moles, voles, gophers ,snake burrowing rodents

Product Description
Complied with environmental criteria
No chemicals
Chases moles, voles, gophers ,snake burrowing rodents
Runs on solar energy, 24h-autonomy with battery
Weatherproof and UV-resistant

Specifications:
Dimensions: 100mm*85mm*365mm
Power: 0.2w
Solar panel: Monocrystalline 60mAh, 4v
Rechargeale battery(incl. ): 2PCS, Ni-MH, 1.2v/700mAh

15a wire 80M

MPPT 20A Solar Controller Regulator

1.work at Maximum Power Point of V-A curve
2.increase efficiency at 10%-30%.
3.Overcharge protection
4.Short Circuit Protect

MPPT series controller could intelligently track input voltage of solar panel, which could let solar panel always work at Maximum Power Point of V-A curve. Compared with normal solar charge controller, MPPT series controller could increase efficiency at 10%-30%.

1. Features of MPPT series controller

Ø Overcharge protection (automatic reset)

Ø Over-discharge protection (automatic reset)

Ø Battery Reverse Current Protection

Ø Overloading Protection

Ø Short Circuit Protection

Ø Reverse Polarity Connection Protection

Ø Temperature Compensation

Ø Lighting protection

2. Advantages of MPPT series controller

Mppt solar controller 20A

Main Features

	Intelligent Maximum Power Point Tracking technology

	Built-in DSP controller with high performance

	Automatic battery voltage detection


	Three-stage charging optimizes battery performance



	Auto load-detection

	Multifunction LCD displays detailed information

	Reverse polarity protection of solar panel and battery

	Overcharge and overload protection

	IP 43 protection for outdoor and harsh environment

	Suitable for battery types of sealed lead acid, vented Gel, and NiCd

	Standard RJ45 port or optional RS-485 communication port for remote monitoring made from taiwan

MPPT 10A Solar Controller Regulator 10 Amp

MPPT 10A Solar Controller Regulator 10 Amp

MPPT stands for Maximum Power Point Tracking

An MPPT controller is simply an electronic device that alters the voltage and amperage of the solar panel output to more closely match the charging needs of the battery bank and reduce the amount of electricity spent as waste heat. In general, using an MPPT charge controller will increase the efficiency of your solar panel/battery bank set-up by anywhere from 10-30%, depending on the size of the panels, type of battery used, etc.

Here's an example: A solar panel will generally put out 17 volts or so.

Say one panel puts out 10 amps at 17 volts. A 12VDC battery during bulk charging phase only requires 14.6 volts. Without the MPPT charge controller, you'd be charging the batteries at 10 amps @ 17 VDC, and if they're wet cells, boiling off some electrolyte in the process.

Now, let's add an MPPT charge controller. The charge controller takes the solar panel output of 10 Amps @ 17 VDC and will change it to 11.64 amps @ 14.6 VDC... effectively giving the battery 16.4% more charge for the same time period. The charge controller uses a tiny bit of the solar panel's output to transform the output to the batteries―on a good MPPT charge controller, this is less than 2-3% of the power going from the panels to the batteries.

AGM batteries are really required to maximize the benefits of an MPPT charge controller, since they have much higher current acceptance rates.

Tracer 1210 Features
-12/24V auto recognized, 10A rated charging current.
-Advance maximum power point tracking technology to optimize using the solar system
-Automatically recognize day/night
-Timer function with 1-15 hours option for street light
-Two load outputs. Each load can be individually controlled, and enhance the flexibility of the system.
- Sealed, Gel, and Flooded battery option
-Adopting temperature compensation and correcting the charging and discharging parameters automatically,,improving the battery life
-Electronic protection: Over charging, over discharging, overload, short circuit, and reverse polarity of both solar module(s) and battery.
-RJ45 interface with remote meter MT-2, convenient to check operating parameters of controllers.