Questions tagged [sound]

Audible vibrations transmitted through air or other medium

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2answers
68 views

How to choose speaker impedance for a VERY specific application?

Ok, so this may be a long post. I want to preface by saying I have very limited electrical engineering knowledge, so thank you in advance :-) I'm working on a medical device for a college project. ...
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1answer
34 views

VU Meter with Dot/Bar display driver

I found this(link below) video on Youtube, it's a RGB stereo Vu meter based around (obsolete) LM3915 dot/bar display driver. Since author didn't provide schematics and I want to build something ...
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0answers
37 views

Frequency response measurement problem with mobile phone: same (wrong?) readings for different speakers

I have built some bespoke speakers and tried to measure their frequency response. My rig is: Source: Android phone Samsung A3 as a source, playing frequency sweep using Android's Frequency Generator ...
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0answers
33 views

Understanding the workings of an ultrasonic sensor

I am trying to simulate an ultrasonic sensor using a ray-based approach. For that, my current process can roughly be described as such: approximate wavefront using rays that mimic the shape of the ...
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2answers
60 views

PIC MCU: Reliably Capture and Measure Drum Transients with ADC

I'm seeking advice to help my circuit/code/mcu work more reliably and accurately. What I've got right now is almost there, but I'm just missing the know-how to get me consistent readings. I've tried ...
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1answer
100 views

TDA2030 vs TDA2050 vs LM4440 [closed]

Which one of the three ICs you will suggest or most recommend to build an audio amplifier. I have checked the datasheets but still, I want to know how they perform in practice, which one sounds better ...
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2answers
77 views

Suggestions for TDA2030 Audio Amplifier

Please suggest any ways to improve punch or bass of the sound for the following audio amplifier using TDA2030A. The sound output of the amplifier lacks some bass. Can I use TDA2050 to improve sound ...
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1answer
68 views

Directional Speakers

I am working on an exhibition where I want to use DIY, self-made directional speakers for transmitting interviews to the visitors. Until now I have seen a couple of video on Youtube like the one ...
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1answer
34 views

How to make my sound reactive LEDs with Tip31C work?

I am building a rhythmic led headphone prototype, but unfortunately I am missing something or am doing something wrong because my project is not working properly. The project is as follows: I bought ...
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1answer
21 views

DC power from speaker amp for power to switch relays?

Can you—or how do you—switch a relay using the power being directed to a speaker from an AV Receiver? Here's what I'm working on: In my kids playroom is an iMac on the East wall, and a projector on ...
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0answers
25 views

How do you model acoustic waves underwater that are generated by an Nd:YAG laser?

In this paper on page 84 they show the following experimental setup: The array of receiver hydrophones are set up to record sound pressure waves sent by the transmitter hydrophones. In Figure 6....
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1answer
67 views

Why is a square wave used for audio power calculations?

I am trying to read this datasheet (NXP TDF8546 Class AB Power Amplifier). On page 12, the power calculations are mentioned as Po(max): RL = 4 Ohm, Vp = 14.4V, Vi = 2 V RMS Square wave As far as I ...
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2answers
62 views

YM3012 Analog Ground

I am trying to build a circuit using Yamaha Sound chip YM2151 with Yamaha DAC YM3012. This is my first attempt in doing anything with analog signals, so there is much to learn! While reading a ...
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3answers
559 views

High pitch audio frequency measuring

Wondering on how could higher pitches than 23 kHz be measured, I can only find devices measuring to about 21kHz. Main question is: how could audio frequencies about 26 kHz or 30 kHz be measured, on ...
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8answers
245 views

How does a transistor make a signal copy?

I am very new here and almost just as new at learning about electronics. I am a musician and sound engineer first and foremost and I just recently have caught the circuits bug. My first big task has ...
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16 views

Ultrasonic transducer

Can a small ultrasonic transducer be retro fitted to the fuel bowl of a motorcycle carburetor. For the purpose of using sound waves to maintain clean jets. And possibly lengthen the longevity of the ...
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2answers
108 views

Why do idle computers make noises?

Suppose that you have a typical laptop computer that is turned on, muted, doing pretty much nothing (e.g. no fan, CD drive, or speaker use), has pretty much nothing being done to it (e.g. no presses ...
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3answers
76 views

Best XLR cable and metal for home use & vocals? [closed]

I am very lost on what the recommended XLR and also the what the recommended type of metal connector is for sound quality as many say completely different things such as Silver being more conductive ...
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0answers
35 views

Loudspeaker electro-magnetic waves noise isolation

I read about the magnetic waves created by Loudspeakers, causes noise in electronics circuit. If a speaker is going to be soldered in-place with all other circuit components, how can the noise be ...
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0answers
52 views

Components to record ultrasonic sound? Up to 200kHz

For a personal project, I’m trying to record ultrasonic sound. I would like to find the best way to record from 20kHz to 200kHz. As I found from Wikipedia, animals can hear up to 200kHz. As I prefer ...
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0answers
30 views

Easiest way to control multiple speakers from a central location

I am looking to build something that drives multiple ultra low frequency speakers/shakers (around 5 to 10 of them in 0 to 30 Hz range). They'd all be driven with simple sine waves, though not 100% ...
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1answer
60 views

How to analyze a dB graph?

The following chart represents almost 5 hours of input received by a sonometer (BENETECH GM1356) at each second in an apartment room. How can I find the answers to the following questions from this ...
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1answer
44 views

Designing a bluetooth audio unit for speaker

(Cross posting from Sound design stack exchange since it was declared off topic there) I have a sony speaker from an old Home Theatre System that is broken now leaving the standalone speakers in a ...
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1answer
65 views

How much power is needed to run these speakers?

I have couple of loudspeakers. Each is rated for: RMS Power 60 watts Power 75 watts vc Imp 16 Ohms I am going to build an audio amp for those but not sure how much power is needed. I'm concerned ...
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1answer
204 views

dBA conversion into dB or dB SPL

I saw many websites that how to convert dBA sound to Db and dB SPL conversion. but I did not find any such relationship to convert dBA into dB or dBSPL. Is there any such formula or relationship that ...
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1answer
37 views

lots of 3d sound in handsfree [closed]

My earphone gives lots of 3d sounds and when i eject little bit it sounds good, actually i’m repairing i-e change of jack. Kindly help Your reply will be highly obliged.
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0answers
27 views

adding rc filter to cheap sub

I bought a cheap computer Sub to repurpose it as a selfmade gaming vest. The circuit has 2 amplifiers on it, one for the normal unfiltered sound that goes to the 2 speakers, and then the output of ...
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1answer
202 views

Class D amplifier question

I am designing a class D amplifier for a pair of bookshelf speakers (Sony SS-MB150H). I guess inside each speaker there is a crossover for each driver but... am I right to assume that I just need to ...
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0answers
69 views

Amplifying analog signal from AO of KY-038

I'm using a KY-038 for sensing sound if I connect the DO pin and set the potentiometer to the highest viable sensitivity then if I make a loud sound it detects and sends an output upwards until 1023. ...
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2answers
73 views

How to generate a sound has 32bit resolution and 96kHz sampling rate [closed]

I'am looking for a mcu which has enhanced DAC performance to generate a sound which has some features (32bit BD / 96kHz SR) but i couldn't cause of bitdept. Are there any mcu which are capable to do ...
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0answers
133 views

Can I reduce volume of active buzzer with arduino?

I connected arduino's 5v pin to active buzzer's positive. And it makes a loud noise. I tried connecting arduino's 3.3 v pin and yet the active buzzer is making a loud noise. Is there a way to reduce ...
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1answer
64 views

How can I turn a midi keyboard to a stand-alone piano using Arduino or any other way? [closed]

I have a midi keyboard, but I find it frustrating to start PC, DAW system every time I want to play. Is there a way to use Arduino to create an on the go stand alone piano. (It should work like a ...
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0answers
81 views

VU Meter only with 1LED (PWM) no IC except for OPAMP

first of all yes it is homework but I worked on it and stuck at only this part. Maybe I am approaching on wrong side I am open to every advice. I changed the idea in my mind. I want to make a ...
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0answers
43 views

Software to detect certain sounds?

I’m trying to incorporate into an arduino, some programme to light up an LED when it hears certain sounds. Basically Shazam. This app uses the fourier transform to break down songs into frequencies ...
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1answer
89 views

Does cutting the covering of subwoofer wire affect the sound quality?

I have Sony 5.1 channel sound system. There is some cut on covering of subwoofer wire. The copper wire is not affected at all. So, I am curious to know whether it will leak the passage of sound and ...
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1answer
185 views

Trying to make fuzz factory with CV inputs

I'm trying to construct some kind of fuzz factory modular from regular fuzz factory pedal. Circuit of the original pedal is pretty easy, but I've tried to add some VCAs based on LM13700. Honestly, I'...
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4answers
129 views

What controls the MAXIMUM allowed frequency of the sound in electronics? The circuit or the speaker component?

I noticed that on some of my devices, I cannot go further than 22.0 kHz, 32.0 kHz, 44.1 kHz, 48.0 kHz and such but what actually causes these limits?
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2answers
131 views

3.5mm Push to Talk Switch

I am looking to take a 3.5mm microphone line, insert a press button switch (a foot pedal in my use case) between the headset and the computer. I would like the switch to mute the mic connection when ...
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3answers
91 views

Tone output with AVR

I've got a keypad hooked up to an ATMega168 and its supposed to play various tones depending on the button pressed while the respective key is held down. I'm generating these tones by alternating the ...
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2answers
42 views

Transistor amplifier keeps flickering between working and off

So long story short, i got some speakers from an old music player and they are huge (around 2.5 inches diameter and 1.5 inches high), i gave them new wires to use with a breadboard so i used a ...
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1answer
52 views

Speakers Power and Quality Difference Factor

I started tinkering with speakers (mostly amplifier circuits) and I learned a lot about how sound and amplifying works but I don't understand how to increase quality I have several kind of speakers , ...
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2answers
71 views

In general, construction wise, what makes a speaker more or less sensitive to mid tones?

I bought a second hand vintage boombox and the left (full-range/'woofer') speaker has gone so I replaced both speakers with some Sony ones. The Sony ones are taken from of cabinets lying around (the ...
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1answer
480 views

pam8403 using low wattage speaker

I am using the output of usb sound card as an input to PAM8403 ic with specs from datasheet. However i am using 4 ohm 0.5 W speaker. So i have tried testing with that and it works but sometimes with ...
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2answers
120 views

Why is the microphone output level not proportional to the sound level?

I set up a system to measure the sound pressure level in a location. This consists of a Knowles SPU0410LR5H-QB microphone connected to the codec SGTL5000, which is connected to the micro-controller ...
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2answers
132 views

Potential hardware solutions to detecting which string/fret is being played on a guitar? [closed]

I'm aiming to translate sounds played from the guitar to guitar tabs (accurately). I've had a look at solutions for detecting which string is being plucked: Detect string plucking in electric bass ...
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0answers
97 views

Clap switch working on 220 Volts AC

I have made this clap switch.It is working fine presently. I need suggestions for improvement for its long term use. Specifically I want to know if the capacitor based power supply is okay in this ...
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4answers
258 views

sound to voltage

I'm searching for a method that can convert sound to voltage. I have a .wav format file. The .wav file format is 16bit and 44kHz sampling rate. I want to play the .wav file on my PC and convert PC ...
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1answer
79 views

LM567 or Custom bandpass filter

I'm using a array of hydrophones to localize an underwater pinger (37.5 kHz and 45 kHz) and I'm thinking of using LM567 tone decoder as a frequency filter. The other option is to design a custom ...
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1answer
59 views

Headphone sensitivity/efficiency

Most commercial headphones are advertised to have sensitivity greater than 90 dB/mW. But to my understanding, even with 100% efficiency that's not possible (if we use 10 log (I/I0) where I = 1 mW, we ...
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0answers
58 views

DIY high fidelity audio using delta sigma adc

This question may be too general, but I will include all the details that I can. My end goal is to achieve a super high-resolution spectrogram of any recording I choose to make. By doing some tests I ...

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