Questions tagged [sound]
Audible vibrations transmitted through air or other medium
359
questions
0
votes
1answer
53 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 ...
0
votes
1answer
36 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 ...
0
votes
1answer
59 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 ...
-2
votes
1answer
40 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 ...
-1
votes
0answers
33 views
Make UV meter db Labels for transistors
i had create schematic of UV meter which LEDs indicat level of db, but i don't know how i can label it, and how i can calculat it using transistors
Schematic : https://easyeda.com/hichm/UV-m-tre-SMD
-1
votes
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.
0
votes
0answers
24 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 ...
2
votes
1answer
184 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 ...
1
vote
0answers
37 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. ...
-1
votes
2answers
72 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 ...
0
votes
0answers
48 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 ...
0
votes
1answer
56 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 ...
0
votes
0answers
74 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 ...
0
votes
0answers
42 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 ...
2
votes
1answer
85 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 ...
0
votes
0answers
42 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'...
0
votes
4answers
125 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?
0
votes
2answers
72 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 ...
0
votes
3answers
85 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 ...
0
votes
2answers
41 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 ...
0
votes
1answer
42 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 , ...
0
votes
2answers
67 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 ...
0
votes
1answer
204 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 ...
1
vote
2answers
114 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 ...
3
votes
2answers
128 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 ...
0
votes
0answers
69 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 ...
0
votes
4answers
141 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 ...
2
votes
1answer
64 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 ...
1
vote
1answer
53 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 ...
1
vote
0answers
52 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 ...
0
votes
1answer
69 views
Translating mic sensitivity dBV to dBSPL
In mic datasheets, mic sensitivity is usually expressed in dBV that equates to 94 dB SPL (@1kHz).
So if my mic sensitivity -46 dBV equates to 94 dB SPL, does that mean that if I double the signal by ...
0
votes
1answer
117 views
Simple 12V preamp circuit before speaker
In my apartment building, we have an intercom system with one central unit and multiple terminals, one per apartment. Unfortunately, after some unknown tweaks done a couple of years ago to the central ...
3
votes
1answer
83 views
what is the difference between these two configurations?
I can understand this circuit configuration:
But i don't understand when signal is placed in Qp's base.
In this configuration we don't have VBB/2 in the two base...
Sorry about my english and thanks ...
1
vote
1answer
60 views
Refraction vs Reflection in Ultrasonic sensor for water level detection
I want to use ultrasonic module JSN-SR04 for detection of water level inside tank. The US module has single sensor for Transmission and Reception of US signals as shown below.
I wonder if US sensor ...
0
votes
2answers
56 views
Powering condenser mic while getting the signal
http://www.afrotechmods.com/groovy/amplifier_tutorial/amplifier_tutorial.htm
Look at the extreme left part of the circuit above seem to power the mic by 9v through a 5k Ohm resistor that powers the ...
2
votes
2answers
642 views
Why is the output signal of my amplifier heavily distorted?
I checked the circuit 1 million times. I got it from a website. Everything is correctly connected. The sound is loud, but it is very distorted. I use a 9 V battery.
Where is the problem? :(
...
0
votes
1answer
62 views
What will be the effect of changing the order of the filters on the sound coming from each speaker in my audio system?
What will be the effect of changing the order of the cross over filters on the sound coming from each speaker in my audio system?
0
votes
4answers
161 views
How did old games from 8-bit era game consoles store music? [closed]
Some time ago I found that the audio of a game called Ninja Gaiden 1 (NES) is around 1 hour. This is excluding the sound effects like jump and hit e.t.c. Then I found that the entire game size is ...
0
votes
3answers
165 views
Why do carrier waves sound silent on radios?
I was recently reading about and building low-power AM radio transmitters, and read/noticed that when the carrier wave is not yet modulated, the radio receiver goes silent.
For example, let's say my ...
1
vote
0answers
200 views
How to Low-Pass PDM Output Data
I have a PDM-Mems Microphone which provides me with 101010 data, the Microphone has a Clock of 3Mhz. I read the manual about how PDM is generated, but I haven't worked with digital filters yet and in ...
-2
votes
1answer
35 views
producing a continuous sound using a timer
I'm looking to produce a pure sound on one frequency to be played via a timer to come on at intervals over a six week period. this is for an undergrad dissertation. would an arduino work and could it ...
0
votes
3answers
135 views
Ultra-low power sound/audio sensor for LOUD noises
I'm searching for a sound/audio sensor with ultra-low power consumption to detect the presence of a really loud noise (100dB+). The controller runs on battery and there is no option for a different ...
7
votes
5answers
2k views
Voltage of sounds of MP3 files
What is the maximum voltage for common music files?
When playing back on a smartphone, if the volume of the smartphone is set to maximum, how much voltage is sent to the earphones of the electric ...
1
vote
2answers
71 views
Circuit Choices for AmpIifier Input
i have breadboarded a TDA2050 amplifier, using this schematic
i get good sound intensity with a half acceptable quality. the down side is the constant noise and humming. i have found a possible ...
1
vote
2answers
74 views
Replacing elements in a tube amplifier
I assembled a tube amplifier.According to the specified scheme (Old Russian radio "Record 66").
1.What is the function of capacitors C9 and C8 ?
2.What will change the capacity of these parts? Will ...
0
votes
3answers
71 views
Convert -dB to equivalent +dB
I asked this question on stackoverflow and stackexchange mathematics, but on both sites my question was closed and suggested to ask here as mentioned in the comments to this question on mathematics.
...
0
votes
1answer
245 views
speaker problem with high volume
I am trying to build an audio system . I have a speaker which is rated 10 W and 8 Ohms . I am using a circuit from datasheet of TDA2040 with a pre-amplifier circuit with the microphone . when I ...
0
votes
0answers
77 views
Custom microphone amplifier poor high frequency response
I've designed and received a custom MEMS microphone amplifier PCB, but am having issues with poor high frequency response and very low sensitivity/gain. Basically the microphone stops picking up ...
0
votes
2answers
149 views
How can I test a microphone circuit with a test signal
I have a microphone circuit very similar to below but I don't have a mic which is on back order. I would like to test the circuit (and the processing that happens downstream) in the meantime. Is it ...
0
votes
1answer
77 views
Creating a custom playback device
First of all, let me apologize if this isn't the correct place to ask this. This is the one of the best places for my question that I've seen so far.
I've been designing a box for on my desk that ...
