Sound level

Dual range sensor that accurately measures both sound pressure level in decibels (dBA) or waveform (mV). 

To make the measurements meaningful to learners, the sensor has been designed to approximate the normal human ear in the range and intensity that it 'hears' sounds. Use a pair of sensors to measure speed of sound in air and solids. 

Download Sound Sensor Manual Doc No.: DS027 | Issue: 4

Sensor Ranges

Contents/Details:

Speed of sound by reflection (Physics (11-14) eBook)
In this experiment a sound is sent down a pipe, which is closed at one end. The time interval between the sound setting off and returning to its starting point is measured, using a Sound sensor. The results are used to calculate the speed of sound. 

Speed sound using 2 sound sensors (Physics (11-14) eBook)
In this experiment, a sound is detected by two Sound sensors which are separated by a known distance. The time interval between the sound striking the first sensor and striking the second sensor is measured. The results are used to calculate the speed of sound. 

Speed of sound in a solid (with sound sensors) (Physics (14-18) : Light, Sound & Pressure eBook)
In this experiment, a sound is detected by two Sound Sensors which are separated by a known distance. The time interval between the sound striking the first sensor and striking the second sensor is measured and used to calculate the speed of sound through the chosen medium. 

Speed of sound In air (with sound sensors) (Physics (14-18) : Light, Sound & Pressure eBook)
In this experiment, a sound is detected by two Sound sensors which are separated by a known distance. The time interval between the sound striking the first sensor and striking the second sensor is measured. The results are used to calculate the speed of sound. 

Speed of sound (by Reflection / echo) (Physics (14-18) : Light, Sound & Pressure eBook)
In this experiment a sound is sent down a pipe, which is closed at one end. The time interval between the sound setting off and returning to its starting point is measured, Only requires single sound sensor.

Speed of sound In air by phase difference. (Physics (14-18) : Light, Sound & Pressure eBook)
In this experiment a signal generator is producing a sinusoidal wave of known frequency. A voltage sensor placed across the output terminals of the signal generator measures the signal at the source of production. A loud speaker is used to make the signal audible and a sound sensor records. The point at which phase matches is equal to lambda. 

Sounds (Physics (14-18) : Light, Sound & Pressure eBook)
An introductory investigation giving plenty of opportunity for students to explore sounds and identify the characteristics that create tone, pitch, timbre etc in musical description of sound. 

How does the instrument affect the sound produced? (Physics (14-18) : Light, Sound & Pressure eBook)
examines the same sound from different instruments. Good introductory activity for sound, also good for analysing waveforms for differences and similarities.

How does stereo sound work? (Physics (14-18) : Light, Sound & Pressure eBook)
This is an activity that can be presented as part of physics discussions on waves, superposition and phasing or as part of work on the ear and sensory reception and perception.

Interference In sound (using Snapshot) (Physics (14-18) : Light, Sound & Pressure eBook)
In this investigation the interference between sound waves of identical frequency but emitted from different sources is investigated. Could be used before looking at interference in light, or as part of the argument about light being both a wave and a particle.

Investigating resonance In a pipe (with a plot of distance) (Physics (14-18) : Light, Sound & Pressure eBook)
In this investigation the students will be able to study the relationship between the length of the pipe and its resonant frequency and be able to reveal the nodes and anti nodes created in a standing wave in the pipe. 

Biometrics and sounds (voice recognition) (Physics (14-18) : Light, Sound & Pressure eBook)
In this practical, students will look at one simple biometric, voice recognition. We know that our voices carry information about our identity. We have all experienced the voice on the telephone we recognise, or our friend talking in a crowded room. Here is simple, fun, activity to investigate.

Waves and superposition (Physics (14-18) : Light, Sound & Pressure eBook)
This investigation allows the students to collect waves generated by a signal generator and use the tools in the EASYSENSE software to add them and see the effects of superposition. This can be complex idea for many students and the ability to use real data and waves gives an alternative learning path. 

Who won (Science in Sport (11-18) eBook)
In this experiment, the students will measure the speed between two points, the start and the finish. It is a model of how timing and speed sensors work and can be used in sport. 

Biometrics (Science At Work (11-16) eBook)
In this practical the student will look at a simple biometric, voice recognition. We know that our voices carry information about our identity can we detect it?