# The Effect of Sound Wave Frequency on Electrical Production in Piezoelectric Transducers

## School Name

Spring Valley High School

## Grade Level

10th Grade

## Presentation Topic

Physics

## Presentation Type

Non-Mentored

## Abstract

With the steady decrease in natural resources there is a high demand to find a reliable method of energy harvesting. While it is unorthodox, piezoelectric materials have potential to generate small amounts of electricity from wasted mechanical energy. The purpose of this experiment was to find a change in electrical output of piezoelectric transducers in reaction to different sound frequencies. It was hypothesized that the increase of frequency of sound waves would result in the increase of electrical output in piezoelectric transducers. A piezoelectric transducer was placed on an electric keyboard and wired to a digital multimeter. Each group represented a different frequency, group one was the control group at 0 Hz, group two’s sound was 65.4 Hz, group three was 261.6.5 Hz, and group four was 1046.5 Hz. There were 30 trials conducted for each of the four frequency levels. Each frequency was played and the electrical output was measured in 200 mṼ on the multimeter. After analyzing the data it was found that the frequency 65.4 Hz had the highest mean out of the groups at 3.171. A One-Way ANOVA was conducted and found that there was a statistical difference between the groups. F(3,120)=81.290 and p<.001. The results did not support the hypothesis since the lowest frequency produced the highest electrical output. Now that it is known that lower frequencies produce a higher electrical output than higher frequencies, future application of piezoelectric transducers can be improved.

## Recommended Citation

Tabler, Zachary, "The Effect of Sound Wave Frequency on Electrical Production in Piezoelectric Transducers" (2023). *South Carolina Junior Academy of Science*. 108.

https://scholarexchange.furman.edu/scjas/2023/all/108

## Location

ECL 116

## Start Date

3-25-2023 10:45 AM

## Presentation Format

Oral and Written

## Group Project

No

The Effect of Sound Wave Frequency on Electrical Production in Piezoelectric Transducers

ECL 116

With the steady decrease in natural resources there is a high demand to find a reliable method of energy harvesting. While it is unorthodox, piezoelectric materials have potential to generate small amounts of electricity from wasted mechanical energy. The purpose of this experiment was to find a change in electrical output of piezoelectric transducers in reaction to different sound frequencies. It was hypothesized that the increase of frequency of sound waves would result in the increase of electrical output in piezoelectric transducers. A piezoelectric transducer was placed on an electric keyboard and wired to a digital multimeter. Each group represented a different frequency, group one was the control group at 0 Hz, group two’s sound was 65.4 Hz, group three was 261.6.5 Hz, and group four was 1046.5 Hz. There were 30 trials conducted for each of the four frequency levels. Each frequency was played and the electrical output was measured in 200 mṼ on the multimeter. After analyzing the data it was found that the frequency 65.4 Hz had the highest mean out of the groups at 3.171. A One-Way ANOVA was conducted and found that there was a statistical difference between the groups. F(3,120)=81.290 and p<.001. The results did not support the hypothesis since the lowest frequency produced the highest electrical output. Now that it is known that lower frequencies produce a higher electrical output than higher frequencies, future application of piezoelectric transducers can be improved.