Mosquitone Detector vs SmarterNoise Pro

"Mosquitone Detector" is a sound measurement app that detects high frequency noises and ultrasonic sounds hard to hear for human ears. The human audible range is generally said to be 20 Hz to 20 kHz, but sounds above 10kHz gradually become harder to hear with age. On the other hand, prolonged exposure to noise at excessively high sound pressure levels has been pointed out as potentially harmful to health, including hearing. You may be unknowingly exposed to artificially generated dangerous high-frequency noise. This app can detect and visualize such noises. For example, there are increasing cases where high frequency noise generators are installed in various places as a purpose of repelling young people and beast pests using very high frequency mosquito noises, which are inaudible to general adults. Young children, in particular, may be exposed to very loud noise in an uncomfortable environment because adults cannot recognize it. Use this app to find high frequency noise and quickly get away from the bad spot or remove the noise source. Two operating modes are available in this app, Detection Mode and Search Mode. Detection Mode can detect if there are high frequency noises and ultrasonic sounds. Search Mode can pinpoint the direction of high frequency sound sources. Features: - Detection of high frequency sound and ultrasonic wave, display of the peak frequency of the highest level. - Search for sound source direction: 360 degrees horizontally - Detectable frequency range: 8 kHz - 16 kHz / 16 kHz - 23 kHz (2 band division) - Function to switch the gain range: 0dB - 100dB / -10dB - 90dB / -20dB - 80dB (in Detection Mode) - Measurement screen rotation function (Rotate) Operating procedure: 1) Selection of detectable frequency band Select the frequency band as more than 16kHz or less than 16kHz. 2) Selection of Operational mode - Detection Mode (Detect) It finds an inaudible high frequency and ultrasonic sound in the frequency band more than 16 kHz (or less than 16 kHz). Tap START button and it starts the detection function. If high frequency or ultrasonic sound exist, it will be displayed on the graph as the peak frequency. You can make the graph display easier to see by switching the gain range. - Search Mode (Search) It finds the direction of occurrence of the high-frequency sound source that detected the peak frequency. Search mode can be used only when high frequency or ultrasonic sound is founded in Detect mode. Please make sure to hold the bottom built-in microphone of iPhone so that it faces outward. If you measure with the microphone facing inward, microphone sensitivity will deteriorate, and accurate measurement will not be possible. Tap Start button, and firmly hold the iPhone terminal, please turn slowly clockwise. Recommended that the time required for a rotation is about 15 seconds and the rotation speed in the graph is approximately 4 rpm. The measurement is completed by one revolution, and the signal strength of the peak frequency is displayed on the pie chart. You can find approximate direction of the high-frequency sound source relative to your standing position. 3) Snapshot Measurement results can be saved as image files in “Photos,” and a timestamp is embedded in the image. Note: If the frequency changes periodically or randomly, it is not possible to determine the direction of occurrence in "Search". Ultrasonic measurement depends on the sensitivity characteristics of the built-in microphone, so the measurement result may vary. Peak frequency measurements (dB) conform to general noise levels. Remarks: It is still under study about health effects on human body by listening to high frequencies including ultrasonic sound. If the high frequency noise of high level is detected daily, we recommend that you consult an expert. Please visit our iOS App Support page for more information on this app.

SmarterNoise Pro is the most advanced edition of the SmarterNoise recording sound level meters. SmarterNoise Pro edition is developed especially with more advanced measurements in mind, and includes many requested features such as a frequency spectrum display, export of measurement data, A-, C- or no weighting for sound level measurement, and full screen audio mode. SmarterNoise Pro edition does not contain any advertising, and performs accurately and fast. Features: • Sound level measurement in video mode • Sound level measurement in audio mode • Sound meter snapshot camera • Record video and audio files (paid function) • Recording timer • Sound level activated audio recording • Frequency spectrum display (paid function) • Peak frequency detection • A-, C- or no frequency weighting • Export of measurement data in CSV format • Full HD (paid function), HD and VGA video resolution • Three video quality settings • Archive for saved files • Sharing of saved files • Calibration • Save location of measurement (optional) • Time and date • Continuous Leq, LAeq, LCeq value • 10 second sound level average (Leq, LAeq, LCeq) • 60 second sound level average (Leq, LAeq, LCeq) • Maximum and minimum decibel level About decibels and sound level measurement The unit for measuring sound is called a decibel. Because the decibel scale is logarithmic, a sound with an intensity that is twice that of a reference sound corresponds to an increase of about 3 decibels. The reference point of 0 decibel is set at the intensity of the least perceptible sound, the threshold of hearing. On such a scale a 10-decibel sound is 10 times the intensity of the reference sound. Highlighting this is important as already a few decibels higher or lower makes a noticeable difference in how noise is perceived. The preferred method to describe sound levels that vary over time, resulting in a single decibel value measuring the total sound energy over the period, is called Leq. It is however common practice to measure sound levels using A-weighting, which attenuates lower and higher frequencies that the average person cannot hear. In this case the value is called LAeq. A- and C-weighting The A-weighting is a standard, commonly used filter that attempts to alter the measured sound pressure levels to more closely match the perception of the human ear. A-weighting makes the sound level meter less sensitive to very high (over 8000 Hz) and low frequencies (below 1000 Hz). C-weighting also attenuates low and high frequencies, but the attenuation of low frequencies is much less severe compared to A-weighting. Calibrate: Calibrate the application using the calibration tool found in the settings menu. Phones and their components vary in quality and setup so you need to calibrate the app in order for the results to be relatively comparable. One suggestion is that you close the window and door to your bedroom or bathroom, turn off appliances, and once its very quiet calibrate the app so the reading is about 30 decibel.