The unwanted sound in our surroundings is called sound pollution.

Effects of sound pollution on biodiversity:

1. The first harmful effect is loss of hearing. 

2. It also leads to several health related problems, 

e.g : Sleeplessness, hypertension, increase in blood pressure, etc. 

3. It effects the mental health of people. 

4. In animals, noise can increase the risk of death by altering predator or prey detection and avoidance, interfere with reproduction and navigation and contribute to permanent hearing loss. 

5. Noise pollution causes poor quality of crops.

6. Under water animals such as whales and dolphins too experience discomfort due to noise pollution caused by submarines, shipping companies and sonars. Cuttle fish and octopus suffer serious damage from noise pollution.

The steps to reduce sound pollution : 

1. Attach silencers to the bikes and other machines to reduce sound. 

2. Manufacture machines that work with lesser noise. 

3. During the use of TVs and taperecorders tune down volume of sound.

4. Plant trees to reduce sound pollution.