Privacy Policy

This policy explains what happens to information when you visit audiosignalnotes.com (the "Site"). It is written to be readable rather than exhaustive, and the short version is this: the calculators send nothing anywhere and what you type into them stays in the page; the Site runs no analytics and sets no cookie of its own; and the only third-party script is Google's advertising system, described in section 4, which is what pays for the hosting.

1. Who is responsible

The Site is operated by the individual publisher identified on the contact page, who is the data controller for the limited processing described below. Privacy questions and requests can be sent to hello@audiosignalnotes.com.

2. Information the calculators handle

The tools on this Site (dB conversion, IEEE 754 conversion, window generation, FFT and RMS analysis, coherence, FIR design, CRC, Nyquist and acoustic timing) execute entirely in your browser. Values you type, and any file you open in a tool, are processed in memory on your device. They are not transmitted to the Site's operator and they are not stored on any server. Closing or reloading the page discards them.

3. Information collected automatically

The Site is served as static files by a hosting provider. Like almost all web hosting, the provider may record standard request data in server logs — IP address, time of request, requested URL, referrer and user-agent — for security, abuse prevention and aggregate traffic statistics. That processing is carried out by the hosting provider as part of delivering the Site.

The Site sets no first-party cookie and runs no analytics of its own. Every resource a page needs to render — stylesheet, scripts, images — is served from this domain, and the pages use system fonts, so apart from the advertising code described in section 4 a visit generates no request to anyone else. Values you enter in a calculator are not part of any of this: they are never included in a request, a log line or an event.

4. Cookies and third-party services

The Site is funded by display advertising served by Google AdSense. That is the only third-party script a visit loads, and the only thing that can leave a cookie behind. There is no analytics, no tag manager, no social embed and no font service, so there is nothing else to enumerate.

4.1 Advertising

Ads are served by Google LLC and, for visitors in Europe, by Google Ireland Limited (together "Google"). Google and its advertising partners use cookies and similar technologies — web beacons, IP address, device and browser identifiers — to collect information about your activity on this and other websites, and to serve advertising based on those visits. Google's own account of what it does with that data is at policies.google.com/technologies/partner-sites.

Third-party vendors, including Google, use cookies to serve ads based on your prior visits to this website or to other websites. The operator of this Site receives none of that information: what arrives is an aggregate report — page views, click counts, estimated revenue — from which no individual visitor can be identified. The Site sells and shares nothing, because it holds nothing to sell.

Advertising appears on article pages only. It is not placed on this policy, the terms, the disclaimer, the contact page or the error page, and it is never inserted inside a calculator. The seller declaration that Google requires from publishers is published at /ads.txt.

4.2 Your choices

In the EEA, the UK and Switzerland, advertising cookies are set only after you consent through the message shown on the page. That message comes from Google's certified consent management platform and appears before any ad is requested. Declining is a working option rather than a dead end: ads may still appear, but they are non-personalised. The same control can be reopened at any time to change or withdraw a choice, and withdrawing it stops the personalised treatment from that point onwards without affecting anything that happened before it.

Elsewhere, and for personalised advertising in general, you can opt out of Google's use of advertising cookies at Google Ads Settings. You can also opt out of a third-party vendor's use of cookies for personalised advertising at aboutads.info in the United States or youronlinechoices.eu in Europe. Opting out does not remove ads; it removes the personalisation.

Non-personalised ads still involve cookies in a narrow sense: they are used for frequency capping, aggregated reporting, and detecting fraud and abuse. They are chosen from the content of the page rather than from a profile of you, which is the reason the Site can keep the calculators free without asking you to be identified.

4.3 Hosting and links

The other party involved in a visit is the hosting provider that serves the files, described in section 3. Links to other websites are ordinary hyperlinks; no information about you reaches the destination until you follow one, at which point that site's own policy applies.

5. Legal bases (GDPR / UK GDPR)

Where advertising cookies are set, the basis is your consent (Article 6(1)(a)), which you may withdraw at any time using the control described in section 4.2. Withdrawing it does not affect the lawfulness of anything done before the withdrawal.

Everything else rests on legitimate interests (Article 6(1)(f)): delivering static content, the standard request logging described in section 3, and serving non-personalised advertising where consent has been refused — which keeps the Site funded without profiling the reader. There is no analytics, no profiling beyond advertising, and no automated decision-making that produces legal effects.

6. Your rights

Subject to applicable law, you have the right to request access to, correction of, or deletion of personal data held about you; to restrict or object to processing; and to data portability. In practice the operator holds no such data beyond the emails you choose to send, but the rights apply regardless. To exercise any of them, contact hello@audiosignalnotes.com.

If you are in the EEA or the UK, you also have the right to withdraw consent at any time and to lodge a complaint with your national supervisory authority. If you are a California resident, you have the right to know what personal information is collected, to request its deletion, to opt out of the sale or sharing of personal information, and not to be discriminated against for exercising those rights. Personalised advertising can amount to "sharing" for cross-context behavioural advertising under the CPRA, so the opt-outs in section 4.2 are the control for that. The operator itself has no personal information to sell: what the ad system collects goes to Google, not here.

7. Children

The Site is aimed at technical professionals and is not directed to children under 16. Personal information from children is not knowingly collected. If you believe a child has provided personal information, please make contact so it can be removed.

8. International transfers

Both services a visit depends on operate internationally. The hosting provider may process request data in the United States and elsewhere, and Google may process advertising data outside your country, including in the United States. Those transfers rely on the safeguards each provider has put in place — certification under the EU–US Data Privacy Framework where the recipient holds it, and standard contractual clauses where it does not.

9. Retention

The Site's operator holds no visitor account data and therefore retains nothing personal beyond correspondence you send by email, which is kept only as long as needed to deal with the matter. What the hosting provider and Google retain is governed by their own policies, and neither reports it to this Site at the level of an individual visitor.

10. Changes to this policy

This policy may be updated to reflect changes in the services used or in applicable law. The revision date at the top of the page is always current, and material changes are reflected there rather than announced separately. The most recent material change, on 20 October 2026, was the introduction of display advertising; the previous revision described a Site that had no third-party service at all, which is no longer true.