I want to detect claps sound instead of whistles

[Westporch]

Hello.
I keen to study WhisAPI Demo app for detect claps sound (mewing, baby crying etc).
so I found a WhistleApi.java file.
(https://code.google.com/p/musicg/source/browse/src/com/musicg/api/WhistleApi.java?r=f2fbf166a1d95059650274d6ee668ec08fec03cf)

package com.musicg.api;

import com.musicg.wave.WaveHeader;

/**
 * Api for detecting whistle
 *
 * @author Jacquet Wong
 *
 */
public class WhistleApi extends DetectionApi{
      
        public WhistleApi(WaveHeader waveHeader) {
                super(waveHeader);
        }

        protected void init(){
                // settings for detecting a whistle
                minFrequency = 600.0f;
                maxFrequency = Double.MAX_VALUE;
              
                minIntensity = 100.0f;
                maxIntensity = 100000.0f;
              
                minStandardDeviation = 0.1f;
                maxStandardDeviation = 1.0f;
              
                highPass = 100;
                lowPass = 10000;
              
                minNumZeroCross = 50;
                maxNumZeroCross = 200;
              
                numRobust = 10;
        }
              
        public boolean isWhistle(byte[] audioBytes){
                return isSpecificSound(audioBytes);
        }
}

[Question 1]
How do you determine the value of variables in the init()?

[Question 2]
What is the meaning of highPass, lowPass, minNumZeroCross, numRobust?

[Question 3]
If the app detect claps sound, replace the value of variable with relevant to claps sound value.
Is it right?


Sorry for my bad english.
Thanks you in advance.

[fantasy sphinx]

Hi

i am also a beginner and trying to understand the code. i did a comparison of whistleAPI and clapAPI and indeed the difference is in the init part so i assume if u change the values u will detect other stuff..though the problem is how do we know exactly what value to use.

    protected void init()

    {

        minFrequency = 600D;

        maxFrequency = 1.7976931348623157E+308D;

        minIntensity = 100D;

        maxIntensity = 100000D;

        minStandardDeviation = 0.10000000149011612D;

        maxStandardDeviation = 1.0D;

        highPass = 100;

        lowPass = 10000;

        minNumZeroCross = 50;

        maxNumZeroCross = 200;

        numRobust = 10;

    }

as we can see values such as deviation, numZeroCross, numRobust change

[Hyun-Gwan Seo]

Hello!!!!

Thanks fantasy sphinx. :-)

mewing, baby crying... I'm not found values.

I created CarApi.java that recognize the carhorn.

But, my CarApi also recognize the other sounds(for example whistles)

I guess that make other functions to capture the carhorn.(Beep!!!~~~ Beep!~~~~~~)

How about DetectDecibel()??? 

Carhorn is about 110dB In my country (Rep.of Korea) so I'll capture the around 100dB sounds.

But This method is insufficient to exactly detect carhorn. :-(

I continously find the perfect solution to detect carhorn.

Thanks.

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[ladya...@gmail.com]

Hello. please i am working on a mobile app project for babies and was wondering if anyone here could help with a  source code for detecting baby cry and alerts a parent. thank you

[ladya...@gmail.com]

or if i could just get an api for detecting baby cry? thank you

On Friday, July 4, 2014 at 12:15:28 PM UTC, Westporch wrote: