2022/10/21

New updated iOS App - "Sound Level Analyzer PRO" ver 5.1

icon-slapro_v500.png

"Sound Level Analyzer PRO" has been updated to ver 5.1 today!

"Sound Level Analyzer PRO" is an integrated sound measurement app with sound level measurement and powerful sound analysis tools.

This app is a further evolution of "Sound Level Analyzer Lite" and "Sound Level Analyzer", which are used as the standard noise measurement app around the world.

It can display automatically the instantaneous sound level such as environmental noise, specific sound sources, live sounds in real-time.

The latest version features improved performance and a revamped UI design for better visibility.

slapro_main_1_v500.jpg slapro_main_c_slow_v500.jpg

In addition, this app has advanced sound analysis functions that can perform "Power Spectrum Analyzer", "Time Course graph", and "Statistical Analysis (Histogram, Percentile Level)".

It can be used to analyze characteristics and trends of occurrence for the noise/sound source.

# Power Spectrum Analyzer
slapro_ps_all_2_v510.jpg slapro_ps_mid_2_v510.jpg slapro_ps_high_2_v510.jpg

# Maximum level detection (displays the power spectrum with the maximum level detected within the measurement time)
slapro_ps_max_v510.jpg slapro_ps_max_octval_v510.jpg

# Time Course graph (displays measurement results for up to 8 hours)
slapro_tc_1_v500.jpg

# Statistical Analysis (Histogram, Percentile Level)
slapro_sa_hist_1_v500.jpg slapro_sa_ln_1_v500.jpg

# Example of the noise level situation:
- 130dB : Engine sound of Airplane
- 110dB : Horn of Car
- 100dB : Noise of passing train
- 90dB : In loud factory
- 80dB : In the train, Vacuum cleaner
- 70dB : Noisy office, Noisy street
- 60dB : Quiet Car, Normal conversation
- 50dB : Quiet office
- 40dB : In the library, Quiet residential area
- 30dB : Outskirts of midnight, Whisper
- 20dB : Sounds of rubbing leaves

If you are interested in this app, please click the following link to display on the product information of AppStoreTM.

Available_on_the_App_Store_Badge_US-UK_135x40.png
posted by toons at 09:00 | News

2022/10/12

New updated iOS App - "Sound Level Analyzer Lite" ver 7.0

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"Sound Level Analyzer Lite" has been updated to ver 7.0 today.

"Sound Level Analyzer Lite" is a sound level meter app for iPhone.

It is a free app that has simplified the function of "Sound Level Analyzer" / "Sound Level Analyzer PRO".

Simply press the start button to easily measure sound levels. The measured sound level is displayed in decibels (dB).

Available in variety of applications as the neighboring environmental noise measurement, audio system check, vehicle interior noise check, sound check of live events, and more.

The latest version supports iOS 16.0, improves performance, and updates the UI design.

slalite_leq_a_1_v700.jpg slalite_leq_c_2_v700.jpg

# Example of the noise level situation:
- 130dB : Engine sound of Airplane
- 110dB : Horn of Car
- 100dB : Noise of passing train
- 90dB : In loud factory
- 80dB : In the train, Vacuum cleaner
- 70dB : Noisy office, Noisy street
- 60dB : Quiet Car, Normal conversation
- 50dB : Quiet office
- 40dB : In the library, Quiet residential area
- 30dB : Outskirts of midnight, Whisper
- 20dB : Sounds of rubbing leaves

If you are interested in this app, please click the following link to display on the product information of AppStoreTM.

Available_on_the_App_Store_Badge_US-UK_135x40.png
posted by toons at 19:51 | News

2022/10/11

Thanks for the 10th anniversary of TOON establishment.

toon_logo.png

TOON celebrated the 10th anniversary of establishment on October 11 today.

We would like to thank you all for your support in helping us reach this milestone year.

Currently, the COVID-19 pandemic and various other difficult events are occurring frequently, forcing people around the world to make the transition to a new lifestyle. So we will continue to provide new methods and tools to support a more comfortable life.

October 11, 2022 
TOON, LLC.
posted by toons at 00:10 | News

2022/10/05

New updated iOS App - "Sound Level Analyzer" ver 6.0

icon-sla_v600.png

"Sound Level Analyzer" has been updated to ver 6.0 today!

"Sound Level Analyzer" is a standard noise measurement application for iPhone.

It measures the sound level (noise level) of environmental noise, specific sound sources, music sounds, etc. in real time, and also allows you to check the maximum value, minimum value, and time-averaged value.

The latest version supports iOS 16.0, improves performance, and updates the UI design.

sla_main_a_fast_v600.jpg sla_main_s1_v600.jpg sla_main_fz_v600.jpg

Sound levels are indicated in decibels (dB).
It can be used as a sound level meter for ambient noise (A-corrected), a sound level meter for monitoring live events (C-corrected), or to measure sound levels without aural correction (Z). Time variability over the last 20 seconds can be displayed graphically.

In addition, frequency analysis can be displayed along with sound level measurements.

sla_ps_fftall_s1_v600.jpg sla_ps_mid_s1_v600.jpg sla_ps_high_s1_v600.jpg sla_ps_fftall_octval_s1_v600.jpg

It can also detect the maximum peak level and display the measurement results at the point of detection after the measurement is completed.

sla_ps_fftall_displaymax_v600.jpg sla_ps_fftall_displaymax_octval_v600.jpg

# Example of the noise level situation:
- 130dB : Engine sound of Airplane
- 110dB : Horn of Car
- 100dB : Noise of passing train
- 90dB : In loud factory
- 80dB : In the train, Vacuum cleaner
- 70dB : Noisy office, Noisy street
- 60dB : Quiet Car, Normal conversation
- 50dB : Quiet office
- 40dB : In the library, Quiet residential area
- 30dB : Outskirts of midnight, Whisper
- 20dB : Sounds of rubbing leaves

If you are interested in this app, please click the following link to display on the product information of AppStoreTM.

Available_on_the_App_Store_Badge_US-UK_135x40.png
posted by toons at 18:08 | News

2022/10/01

Loudspeaker using MarkAudio "OM-MF4-MICA" - part 4 - Listening impression and measurement

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First, I adjusted the 250 Hz peak when combined with the lower cabinet. However, I only had to add a little sound-absorbing material in the middle of the duct.

Since I did not have a proper sound absorbing material on hand, I substituted aquarium filter mat. The material was probably polypropylene, 8mm thick. The only place to put it in was at the first fold, and I just pushed it in from the duct entrance.

First, I compared each frequency response. The results of the measurements with the "Audio Frequency Analyzer" are as follows (without sound absorbing material = upper figure, with sound absorbing material = lower figure).

01.吸音材.PNG

As expected, the one with sound absorbing material was about 2dB lower at 250Hz. If the amount of sound-absorbing material is increased, it should decrease even more.
However, it might block the sound path, so I left this one piece alone.

I finally got around to listening.

Usually I play CDs that I have on hand and listen to them as I go along, but this time I had to hear how the different methods would change the sound.

I used a sample CD from the January 2011 issue of Stereo magazine.

This time, I chose classical and jazz from these recordings because I wanted to hear the difference especially in the low-frequency direction.

 12. Saint-Saëns: Symphony No.3 "Organ Symphony"
 13. Ornette Coleman: Bird Food/Trissonique

The left-right spacing was about 1 m, and the listening position was about 2 m away from the SPs. Sealed and both bass reflexes were performed with TAOC stands, and the acoustic maze was placed on the lower cabinet.

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The sealed system is designed to be used on a desktop, with the ducts blocked by a board. For the bass reflex (upward-facing) system, the board was shifted so that the duct would be open.

The feeling of each method was as follows.

- Sealed box:
03.密閉.JPG

The timpani percussion was light, and it was difficult to hear the descending part of the organ scale. Although I could hear the pitch of the bass, the sound of the strings hitting the fingerboard seemed louder.

- Bass reflex (upward-facing):
03.バスレフ(下).JPG

The timpani percussion was rather audible. The organ scale was also not well resolved. The sound of the fingerboard still seemed to resonate.

- Bass reflex (downward-facing):
03.バスレフ(上).JPG

The timpani percussion became more prominent and the tutti was more powerful. The volume of the wood bass could be felt.

- Acoustic Maze:
03.音響迷路(BH).JPG

The scale of the orchestra sounded a whole lot larger. I could hear the pitch of the organ. The bass guitar sounded more powerful.

Since this is just a subjective impression, I measured the frequency response of each piece.

I set up the iPhone at the listening position (1.8m, about 15° to the loudspeaker) with the left channel only, played a song, and checked the frequency response with peak hold.

Before that, I examined the characteristics of the music source itself with "Music Frequency Analyzer". This application can digitally analyze ripped music data. The following result is a peak-hold analysis of the frequency response of the entire music source.

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"Organ Symphony" was nicely smooth over the entire frequency range.

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"Bird Food" was recorded at a fairly high level in the 63-250 Hz range.

If the frequency response of this sound source could be reproduced well in a listening environment with speakers, it would be the reproduction of the original sound. However, in practice, I think it is quite tough.

The actual measurements for "Organ Symphony" were, from top to bottom, sealed box, bass reflex (upward facing), bass reflex (downward facing), and acoustic maze.

05.実測(オルガン付き).PNG

With the sealed box, 125-200 Hz had a reasonable sound level. With the bass reflex (upward), the same band seemed to be emphasized.

With the bass reflex (downward), the 160 and 200 Hz frequencies dropped slightly and the energy shifted to the 100 and 125 Hz frequencies.

In the acoustic maze, 100 Hz rose further and 80 Hz rose by 6 dB.

The same trend was observed with the "Bird Food." The 160 and 250 Hz frequencies in the bass reflex (upward) were at more stronger level.

05.実測(バードフード).PNG

# Ignore the frequencies of 20Hz and 31.5Hz as they are external noises such as automobile noise.
# A line was drawn later between 80Hz and 100Hz to make it easier to see.

I expected the acoustic maze system to improve down to about 63Hz, but as far as the characteristics are concerned, it came up a little short.

I was hoping for a little more at lower frequencies, given the combined system size of the top and bottom. I thought it was necessary to either extend the sound path further or switch to a double bass reflex system.

This time, I focused on how the low-frequency characteristics changed depending on the type of system.

I thought it was not necessary to emphasize bass so much for a desktop installation. I found that this unit has sufficient reproduction ability even with sealed or bass-reflex systems.

After that, this system should be flipped upside down or duct blocked depending on the sound preferences and the genre of music. For serious listening, the unit should be placed on the lower cabinet. It may be a little troublesome.
.s
posted by toons at 10:08 | Audio